diff --git a/Marlin/src/pins/pinsDebug_list.h b/Marlin/src/pins/pinsDebug_list.h
index 1ab7188b70..1cd380779d 100644
--- a/Marlin/src/pins/pinsDebug_list.h
+++ b/Marlin/src/pins/pinsDebug_list.h
@@ -30,7 +30,7 @@
 // Analog Pin Assignments
 //
 
-#define ANALOG_OK(PN) ((PN) >= 0 && (PN) < NUM_ANALOG_INPUTS)
+#define ANALOG_OK(PN) ((PN) >= 0 && CAT(PN, u) < NUM_ANALOG_INPUTS)
 
 #if defined(EXT_AUX_A0) && ANALOG_OK(EXT_AUX_A0)
   REPORT_NAME_ANALOG(__LINE__, EXT_AUX_A0)