diff --git a/Marlin/src/gcode/feature/runout/M412.cpp b/Marlin/src/gcode/feature/runout/M412.cpp
index 5cf47f2552..c517854011 100644
--- a/Marlin/src/gcode/feature/runout/M412.cpp
+++ b/Marlin/src/gcode/feature/runout/M412.cpp
@@ -35,6 +35,9 @@
  *  S<bool>   : Reset and enable/disable the runout sensor
  *  H<bool>   : Enable/disable host handling of filament runout
  *  D<linear> : Extra distance to continue after runout is triggered
+ *
+ * With FILAMENT_SWITCH_AND_MOTION:
+ *  L<linear> : Missing motion length to consider a jam
  */
 void GcodeSuite::M412() {
   if (parser.seen("RS"
@@ -51,7 +54,7 @@ void GcodeSuite::M412() {
       if (parser.seenval('D')) runout.set_runout_distance(parser.value_linear_units());
     #endif
     #if ENABLED(FILAMENT_SWITCH_AND_MOTION)
-      if (parser.seenval('M')) runout.set_motion_distance(parser.value_linear_units());
+      if (parser.seenval('L')) runout.set_motion_distance(parser.value_linear_units());
     #endif
   }
   else {
@@ -80,7 +83,7 @@ void GcodeSuite::M412_report(const bool forReplay/*=true*/) {
       , " D", LINEAR_UNIT(runout.runout_distance())
     #endif
     #if ENABLED(FILAMENT_SWITCH_AND_MOTION)
-      , " M", LINEAR_UNIT(runout.motion_distance())
+      , " L", LINEAR_UNIT(runout.motion_distance())
     #endif
     , " ; Sensor ", ON_OFF(runout.enabled)
   );
diff --git a/Marlin/src/inc/Conditionals-1-axes.h b/Marlin/src/inc/Conditionals-1-axes.h
index 06faa3c6b1..8744547153 100644
--- a/Marlin/src/inc/Conditionals-1-axes.h
+++ b/Marlin/src/inc/Conditionals-1-axes.h
@@ -71,8 +71,11 @@
   #undef HOTEND_OVERSHOOT
   #undef DISABLE_E
   #undef PREVENT_LENGTHY_EXTRUDE
+  #undef FILAMENT_SWITCH_AND_MOTION
   #undef FILAMENT_RUNOUT_SENSOR
   #undef FILAMENT_RUNOUT_DISTANCE_MM
+  #undef FILAMENT_MOTION_SENSOR
+  #undef FILAMENT_MOTION_DISTANCE_MM
   #undef DISABLE_OTHER_EXTRUDERS
 #endif
 
diff --git a/Marlin/src/module/settings.cpp b/Marlin/src/module/settings.cpp
index 1eb46e606b..e72a2d14ac 100644
--- a/Marlin/src/module/settings.cpp
+++ b/Marlin/src/module/settings.cpp
@@ -260,7 +260,7 @@ typedef struct SettingsDataStruct {
   //
   bool runout_sensor_enabled;                           // M412 S
   float runout_distance_mm;                             // M412 D
-  float motion_distance_mm;                             // M412 M
+  float motion_distance_mm;                             // M412 L
 
   //
   // ENABLE_LEVELING_FADE_HEIGHT