diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 75ab781a7e..827444ab42 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 7cabc7a01a..72f63a4f3b 100755
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -9602,7 +9602,7 @@ void disable_all_steppers() {
 void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
 
   #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-    if ((IS_SD_PRINTING || print_job_timer.isRunning()) && !(READ(FIL_RUNOUT_PIN) ^ FIL_RUNOUT_INVERTING))
+    if ((IS_SD_PRINTING || print_job_timer.isRunning()) && (READ(FIL_RUNOUT_PIN) == FIL_RUNOUT_INVERTING))
       handle_filament_runout();
   #endif
 
diff --git a/Marlin/example_configurations/Cartesio/Configuration.h b/Marlin/example_configurations/Cartesio/Configuration.h
index 634afc7ddb..f606aea221 100644
--- a/Marlin/example_configurations/Cartesio/Configuration.h
+++ b/Marlin/example_configurations/Cartesio/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Felix/Configuration.h b/Marlin/example_configurations/Felix/Configuration.h
index f59173cba8..cc8e8e67d4 100644
--- a/Marlin/example_configurations/Felix/Configuration.h
+++ b/Marlin/example_configurations/Felix/Configuration.h
@@ -691,7 +691,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Felix/DUAL/Configuration.h b/Marlin/example_configurations/Felix/DUAL/Configuration.h
index af0af94278..94d4edbf8a 100644
--- a/Marlin/example_configurations/Felix/DUAL/Configuration.h
+++ b/Marlin/example_configurations/Felix/DUAL/Configuration.h
@@ -691,7 +691,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Hephestos/Configuration.h b/Marlin/example_configurations/Hephestos/Configuration.h
index 2d5f51997d..2a55cbf756 100644
--- a/Marlin/example_configurations/Hephestos/Configuration.h
+++ b/Marlin/example_configurations/Hephestos/Configuration.h
@@ -700,7 +700,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Hephestos_2/Configuration.h b/Marlin/example_configurations/Hephestos_2/Configuration.h
index 162a2628b6..0c4f078400 100644
--- a/Marlin/example_configurations/Hephestos_2/Configuration.h
+++ b/Marlin/example_configurations/Hephestos_2/Configuration.h
@@ -702,7 +702,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/K8200/Configuration.h b/Marlin/example_configurations/K8200/Configuration.h
index 9f8b54d07b..a74e2082a3 100644
--- a/Marlin/example_configurations/K8200/Configuration.h
+++ b/Marlin/example_configurations/K8200/Configuration.h
@@ -725,7 +725,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/K8400/Configuration.h b/Marlin/example_configurations/K8400/Configuration.h
index 8b52c085c2..b6806be19b 100644
--- a/Marlin/example_configurations/K8400/Configuration.h
+++ b/Marlin/example_configurations/K8400/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/K8400/Dual-head/Configuration.h b/Marlin/example_configurations/K8400/Dual-head/Configuration.h
index 79fcf4726a..07038e64fa 100644
--- a/Marlin/example_configurations/K8400/Dual-head/Configuration.h
+++ b/Marlin/example_configurations/K8400/Dual-head/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
index 14de17911c..372fc3fe62 100644
--- a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
+++ b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/RigidBot/Configuration.h b/Marlin/example_configurations/RigidBot/Configuration.h
index fb329ca09e..673f2b75a0 100644
--- a/Marlin/example_configurations/RigidBot/Configuration.h
+++ b/Marlin/example_configurations/RigidBot/Configuration.h
@@ -706,7 +706,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/SCARA/Configuration.h b/Marlin/example_configurations/SCARA/Configuration.h
index ec244874fe..f0d8f194fe 100644
--- a/Marlin/example_configurations/SCARA/Configuration.h
+++ b/Marlin/example_configurations/SCARA/Configuration.h
@@ -723,7 +723,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/TAZ4/Configuration.h b/Marlin/example_configurations/TAZ4/Configuration.h
index 92a9c033dc..2c94543224 100644
--- a/Marlin/example_configurations/TAZ4/Configuration.h
+++ b/Marlin/example_configurations/TAZ4/Configuration.h
@@ -729,7 +729,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/WITBOX/Configuration.h b/Marlin/example_configurations/WITBOX/Configuration.h
index 60d79d52f2..81f6ef36f0 100644
--- a/Marlin/example_configurations/WITBOX/Configuration.h
+++ b/Marlin/example_configurations/WITBOX/Configuration.h
@@ -700,7 +700,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/adafruit/ST7565/Configuration.h b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
index fdd8d79ea6..3122492309 100644
--- a/Marlin/example_configurations/adafruit/ST7565/Configuration.h
+++ b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
@@ -708,7 +708,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/biv2.5/Configuration.h b/Marlin/example_configurations/delta/biv2.5/Configuration.h
index f6a1b8cdd3..eb640ebe98 100644
--- a/Marlin/example_configurations/delta/biv2.5/Configuration.h
+++ b/Marlin/example_configurations/delta/biv2.5/Configuration.h
@@ -800,7 +800,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/generic/Configuration.h b/Marlin/example_configurations/delta/generic/Configuration.h
index 6dd1b8191d..02b014c39f 100644
--- a/Marlin/example_configurations/delta/generic/Configuration.h
+++ b/Marlin/example_configurations/delta/generic/Configuration.h
@@ -794,7 +794,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration.h b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
index 057320b31a..a2daec9e88 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
@@ -797,7 +797,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_pro/Configuration.h b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
index 2cd160adc6..085c764121 100644
--- a/Marlin/example_configurations/delta/kossel_pro/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
@@ -798,7 +798,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_xl/Configuration.h b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
index 679fa5564f..3d0b242b9b 100644
--- a/Marlin/example_configurations/delta/kossel_xl/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
@@ -800,7 +800,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/makibox/Configuration.h b/Marlin/example_configurations/makibox/Configuration.h
index 802c9bbbc5..b8d5bbcb95 100644
--- a/Marlin/example_configurations/makibox/Configuration.h
+++ b/Marlin/example_configurations/makibox/Configuration.h
@@ -711,7 +711,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration.h b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
index 75bbded7fa..cbe2a54052 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
@@ -704,7 +704,7 @@
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
+  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif