diff --git a/Marlin/pins_BRAINWAVE_PRO.h b/Marlin/pins_BRAINWAVE_PRO.h
index cba0d46944..b0d53a0ca9 100644
--- a/Marlin/pins_BRAINWAVE_PRO.h
+++ b/Marlin/pins_BRAINWAVE_PRO.h
@@ -33,7 +33,7 @@
 
 #include "fastio.h"
 
-#ifndef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
+#if DISABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS) // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
   #error "Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config"
 #endif
 
diff --git a/Marlin/pins_TEENSY2.h b/Marlin/pins_TEENSY2.h
index f4f7d4c013..bfadf295d5 100644
--- a/Marlin/pins_TEENSY2.h
+++ b/Marlin/pins_TEENSY2.h
@@ -69,7 +69,7 @@
   #error "Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu."
 #endif
 
-#ifndef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
+#if DISABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS) // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
   #error "Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config"
   // (or build from command line)
 #endif