diff --git a/Marlin/SanityCheck.h b/Marlin/SanityCheck.h
index 3a23b63634..d225bc4c27 100644
--- a/Marlin/SanityCheck.h
+++ b/Marlin/SanityCheck.h
@@ -378,4 +378,8 @@
     #error BTENABLED has been replaced with BLUETOOTH. Please update your configuration.
   #endif
 
+  #ifdef CUSTOM_MENDEL_NAME
+    #error CUSTOM_MENDEL_NAME deprecated - use CUSTOM_MACHINE_NAME instead
+  #endif
+
 #endif //SANITYCHECK_H
diff --git a/Marlin/configurator/config/language.h b/Marlin/configurator/config/language.h
index 10f012775a..b421dd946f 100644
--- a/Marlin/configurator/config/language.h
+++ b/Marlin/configurator/config/language.h
@@ -64,11 +64,6 @@
   #define MACHINE_NAME "3D Printer"
 #endif
 
-#ifdef CUSTOM_MENDEL_NAME
-  #error CUSTOM_MENDEL_NAME deprecated - use CUSTOM_MACHINE_NAME
-  #define CUSTOM_MACHINE_NAME CUSTOM_MENDEL_NAME
-#endif
-
 #ifdef CUSTOM_MACHINE_NAME
   #undef MACHINE_NAME
   #define MACHINE_NAME CUSTOM_MACHINE_NAME
diff --git a/Marlin/language.h b/Marlin/language.h
index 10f012775a..b421dd946f 100644
--- a/Marlin/language.h
+++ b/Marlin/language.h
@@ -64,11 +64,6 @@
   #define MACHINE_NAME "3D Printer"
 #endif
 
-#ifdef CUSTOM_MENDEL_NAME
-  #error CUSTOM_MENDEL_NAME deprecated - use CUSTOM_MACHINE_NAME
-  #define CUSTOM_MACHINE_NAME CUSTOM_MENDEL_NAME
-#endif
-
 #ifdef CUSTOM_MACHINE_NAME
   #undef MACHINE_NAME
   #define MACHINE_NAME CUSTOM_MACHINE_NAME