diff --git a/Marlin/src/Marlin.cpp b/Marlin/src/Marlin.cpp
index 24c61f24a2..ce77844dae 100644
--- a/Marlin/src/Marlin.cpp
+++ b/Marlin/src/Marlin.cpp
@@ -369,10 +369,6 @@ bool pin_is_protected(const int8_t pin) {
   return false;
 }
 
-#if ENABLED(ULTIPANEL)
-  #include "gcode/lcd/M145.h"
-#endif
-
 #if ENABLED(TEMPERATURE_UNITS_SUPPORT)
   #include "gcode/units/M149.h"
 #endif
diff --git a/Marlin/src/gcode/gcode.cpp b/Marlin/src/gcode/gcode.cpp
index ffee424562..8622025007 100644
--- a/Marlin/src/gcode/gcode.cpp
+++ b/Marlin/src/gcode/gcode.cpp
@@ -131,7 +131,6 @@ extern void gcode_M118();
 extern void gcode_M119();
 extern void gcode_M120();
 extern void gcode_M121();
-extern void gcode_M145();
 extern void gcode_M149();
 extern void gcode_M150();
 extern void gcode_M163();
@@ -544,11 +543,7 @@ void GcodeSuite::process_next_command() {
         break;
 
       #if ENABLED(ULTIPANEL)
-
-        case 145: // M145: Set material heatup parameters
-          gcode_M145();
-          break;
-
+        case 145: M145(); break;  // M145: Set material heatup parameters
       #endif
 
       #if ENABLED(TEMPERATURE_UNITS_SUPPORT)
diff --git a/Marlin/src/gcode/lcd/M145.h b/Marlin/src/gcode/lcd/M145.cpp
similarity index 91%
rename from Marlin/src/gcode/lcd/M145.h
rename to Marlin/src/gcode/lcd/M145.cpp
index 3d203f1c33..3fda5bb047 100644
--- a/Marlin/src/gcode/lcd/M145.h
+++ b/Marlin/src/gcode/lcd/M145.cpp
@@ -20,6 +20,13 @@
  *
  */
 
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(ULTIPANEL)
+
+#include "../gcode.h"
+#include "../../lcd/ultralcd.h"
+
 /**
  * M145: Set the heatup state for a material in the LCD menu
  *
@@ -28,7 +35,7 @@
  *   B<bed temp>
  *   F<fan speed>
  */
-void gcode_M145() {
+void GcodeSuite::M145() {
   const uint8_t material = (uint8_t)parser.intval('S');
   if (material >= COUNT(lcd_preheat_hotend_temp)) {
     SERIAL_ERROR_START();
@@ -52,3 +59,5 @@ void gcode_M145() {
     #endif
   }
 }
+
+#endif // ULTIPANEL