diff --git a/Firmware/first_lay_cal.cpp b/Firmware/first_lay_cal.cpp
index cc186dbd6..d3baf5134 100644
--- a/Firmware/first_lay_cal.cpp
+++ b/Firmware/first_lay_cal.cpp
@@ -41,7 +41,7 @@ void lay1cal_wait_preheat()
 {
     const char * const preheat_cmd[] =
     {
-        PSTR("M107"),
+        MSG_M107,
         PSTR("M190"),
         PSTR("M109"),
         PSTR("G28"),
@@ -247,7 +247,6 @@ void lay1cal_square(uint8_t step, float layer_height, float extrusion_width)
 
 void lay1cal_finish(bool mmu_enabled)
 {
-    static const char cmd_cal_finish_0[] PROGMEM = "M107"; //turn off printer fan
     static const char cmd_cal_finish_1[] PROGMEM = "G1 E-0.075 F2100"; //retract
     static const char cmd_cal_finish_2[] PROGMEM = "M104 S0"; // turn off temperature
     static const char cmd_cal_finish_3[] PROGMEM = "M140 S0"; // turn off heatbed
@@ -256,7 +255,7 @@ void lay1cal_finish(bool mmu_enabled)
 
     static const char * const cmd_cal_finish[] PROGMEM =
     {
-            cmd_cal_finish_0,
+            MSG_M107, // turn off printer fan
             cmd_cal_finish_1,
             cmd_cal_finish_2,
             cmd_cal_finish_3,
diff --git a/Firmware/messages.cpp b/Firmware/messages.cpp
index 6a906c34b..3b88702d8 100644
--- a/Firmware/messages.cpp
+++ b/Firmware/messages.cpp
@@ -235,6 +235,7 @@ const char MSG_M23[] PROGMEM_N1 = "M23 %s";
 const char MSG_M24[] PROGMEM_N1 = "M24";
 const char MSG_M83[] PROGMEM_N1 = "M83";
 const char MSG_M84[] PROGMEM_N1 = "M84";
+const char MSG_M107[] PROGMEM_N1 = "M107";
 const char MSG_M500[] PROGMEM_N1 = "M500";
 const char MSG_M600[] PROGMEM_N1 = "M600";
 const char MSG_M701_NO_LIFT[] PROGMEM_N1 = "M701 Z0";
diff --git a/Firmware/messages.h b/Firmware/messages.h
index ccc614a47..6d6fa63e9 100644
--- a/Firmware/messages.h
+++ b/Firmware/messages.h
@@ -241,6 +241,7 @@ extern const char MSG_M23[];
 extern const char MSG_M24[];
 extern const char MSG_M83[];
 extern const char MSG_M84[];
+extern const char MSG_M107[];
 extern const char MSG_M500[];
 extern const char MSG_M600[];
 extern const char MSG_M701_NO_LIFT[];