diff --git a/Marlin/src/lcd/extensible_ui/ui_api.cpp b/Marlin/src/lcd/extensible_ui/ui_api.cpp
index 947e3d4065..f186615b8f 100644
--- a/Marlin/src/lcd/extensible_ui/ui_api.cpp
+++ b/Marlin/src/lcd/extensible_ui/ui_api.cpp
@@ -668,6 +668,8 @@ namespace ExtUI {
             && (linked_nozzles || active_extruder == 0)
           #endif
         ) zprobe_zoffset += mm;
+      #else
+        UNUSED(mm);
       #endif
 
       #if EXTRUDERS > 1
@@ -687,6 +689,7 @@ namespace ExtUI {
         }
       #else
         UNUSED(linked_nozzles);
+        UNUSED(mm);
       #endif
     }