diff --git a/Marlin/pins_5DPRINT.h b/Marlin/pins_5DPRINT.h
index f56ec0b678..e99047f66f 100755
--- a/Marlin/pins_5DPRINT.h
+++ b/Marlin/pins_5DPRINT.h
@@ -74,7 +74,6 @@
 #define DEFAULT_MACHINE_NAME "Makibox"
 #define BOARD_NAME           "5DPrint D8"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
 //
diff --git a/Marlin/pins_BRAINWAVE.h b/Marlin/pins_BRAINWAVE.h
index 2776c50062..932619769b 100755
--- a/Marlin/pins_BRAINWAVE.h
+++ b/Marlin/pins_BRAINWAVE.h
@@ -73,8 +73,6 @@
 
 #define BOARD_NAME         "Brainwave"
 
-#define USBCON 646  // Disable MarlinSerial etc.
-
 //
 // Limit Switches
 //
diff --git a/Marlin/pins_BRAINWAVE_PRO.h b/Marlin/pins_BRAINWAVE_PRO.h
index ef780d5797..acf8642e04 100755
--- a/Marlin/pins_BRAINWAVE_PRO.h
+++ b/Marlin/pins_BRAINWAVE_PRO.h
@@ -80,7 +80,6 @@
 
 #define BOARD_NAME         "Brainwave Pro"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
 //
diff --git a/Marlin/pins_PRINTRBOARD.h b/Marlin/pins_PRINTRBOARD.h
index 7dec695d57..9681e0959e 100755
--- a/Marlin/pins_PRINTRBOARD.h
+++ b/Marlin/pins_PRINTRBOARD.h
@@ -67,7 +67,6 @@
 
 #define BOARD_NAME         "Printrboard"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
 // Disable JTAG pins so they can be used for the Extrudrboard
diff --git a/Marlin/pins_SAV_MKI.h b/Marlin/pins_SAV_MKI.h
index 84646cc4c6..aecd58afde 100755
--- a/Marlin/pins_SAV_MKI.h
+++ b/Marlin/pins_SAV_MKI.h
@@ -69,7 +69,6 @@
 #define DEFAULT_SOURCE_CODE_URL "https://github.com/fmalpartida/Marlin/tree/SAV-MkI-config"
 #define BOARD_NAME              "SAV MkI"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
 //
diff --git a/Marlin/pins_TEENSY2.h b/Marlin/pins_TEENSY2.h
index fa4280fc13..d5eb893ae7 100755
--- a/Marlin/pins_TEENSY2.h
+++ b/Marlin/pins_TEENSY2.h
@@ -112,7 +112,6 @@
 
 #define BOARD_NAME         "Teensy++2.0"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true
 
 //
diff --git a/Marlin/pins_TEENSYLU.h b/Marlin/pins_TEENSYLU.h
index 3fb7f5c3ec..0c2ded63e0 100755
--- a/Marlin/pins_TEENSYLU.h
+++ b/Marlin/pins_TEENSYLU.h
@@ -79,7 +79,6 @@
 
 #define BOARD_NAME         "Teensylu"
 
-#define USBCON 1286  // Disable MarlinSerial etc.
 #define LARGE_FLASH        true