diff --git a/buildroot/bin/build_example b/buildroot/bin/build_example
index 34549769bbb1..a8878e8d9f3f 100755
--- a/buildroot/bin/build_example
+++ b/buildroot/bin/build_example
@@ -32,6 +32,9 @@ $SED -i~ -e "20,30{/#error/d}" Marlin/Configuration.h
 rm Marlin/Configuration.h~
 unset IFS; set +f
 
+# Suppress fatal warnings
+echo -e "\n#define NO_CONTROLLER_CUSTOM_WIRING_WARNING" >> Marlin/Configuration.h
+
 echo "Building the firmware now..."
 $HERE/mftest -s -a -n1 || { echo "Failed"; exit 1; }