diff --git a/Firmware/first_lay_cal.cpp b/Firmware/first_lay_cal.cpp
index 78b515d85b..2997adb728 100644
--- a/Firmware/first_lay_cal.cpp
+++ b/Firmware/first_lay_cal.cpp
@@ -188,7 +188,7 @@ void lay1cal_meander_start(float layer_height, float extrusion_width)
     enquecommandf_P(extrude_fmt_Y, short_length, count_e(layer_height, extrusion_width, short_length));
 #endif //_NEW_FIRST_LAYER_CAL
 
-    enquecommand_P(PSTR("G91"));
+    enquecommand_P(MSG_G91); //enable relative XYZ
 #ifndef NEW_FIRST_LAYER_CAL
     enquecommandf_P(extrude_fmt_X, (float)25*invert, count_e(layer_height, extrusion_width * 4.f, 25));
     enquecommandf_P(extrude_fmt_X, (float)25*invert, count_e(layer_height, extrusion_width * 2.f, 25));
diff --git a/Firmware/messages.cpp b/Firmware/messages.cpp
index 7a0d6cec3d..1c5a31c309 100644
--- a/Firmware/messages.cpp
+++ b/Firmware/messages.cpp
@@ -429,6 +429,7 @@ const char MSG_FILAMENT_RUNOUT_DETECTED[] PROGMEM_N1 = "Filament runout detected
 const char G1_E_F2700[] PROGMEM_N1 = "G1 E%-.3f F2700";
 const char G28W[] PROGMEM_N1 = "G28 W";
 const char MSG_G90[] PROGMEM_N1 = "G90";
+const char MSG_G91[] PROGMEM_N1 = "G91";
 const char MSG_M23[] PROGMEM_N1 = "M23 %s";
 const char MSG_M24[] PROGMEM_N1 = "M24";
 const char MSG_M83[] PROGMEM_N1 = "M83";
diff --git a/Firmware/messages.h b/Firmware/messages.h
index ed1fd857aa..8ce0568406 100644
--- a/Firmware/messages.h
+++ b/Firmware/messages.h
@@ -431,6 +431,7 @@ extern const char MSG_FILAMENT_RUNOUT_DETECTED[];
 extern const char G1_E_F2700[];
 extern const char G28W[];
 extern const char MSG_G90[];
+extern const char MSG_G91[];
 extern const char MSG_M23[];
 extern const char MSG_M24[];
 extern const char MSG_M83[];