diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 3a524141a343..706eae8e72aa 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -97,7 +97,7 @@
   #error "Thermal Runaway Protection for hotends is now enabled with THERMAL_PROTECTION_HOTENDS."
 #elif DISABLED(THERMAL_PROTECTION_BED) && defined(THERMAL_PROTECTION_BED_PERIOD)
   #error "Thermal Runaway Protection for the bed is now enabled with THERMAL_PROTECTION_BED."
-#elif ENABLED(NO_FAN_SLOWING_IN_PID_TUNING)
+#elif defined(NO_FAN_SLOWING_IN_PID_TUNING)
   #error "NO_FAN_SLOWING_IN_PID_TUNING is now TEMP_TUNING_MAINTAIN_FAN."
 #elif (CORE_IS_XZ || CORE_IS_YZ) && ENABLED(Z_LATE_ENABLE)
   #error "Z_LATE_ENABLE can't be used with COREXZ, COREZX, COREYZ, or COREZY."