Fix #9681

Marlin/src/module/configuration_store.cpp

@@ -886,7 +886,7 @@ void MarlinSettings::postprocess() {
     }
     else {
       float dummy = 0;
-      #if DISABLED(AUTO_BED_LEVELING_UBL) || DISABLED(FWRETRACT)
+      #if DISABLED(AUTO_BED_LEVELING_UBL) || DISABLED(FWRETRACT) || ENABLED(NO_VOLUMETRICS)
         bool dummyb;
       #endif