diff --git a/wled00/wled.h b/wled00/wled.h
index ade193a8..524a415a 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -10,6 +10,9 @@
 // version code in format yymmddb (b = daily build)
 #define VERSION 2312160
 
+// WLEDMM  - you can check for this define in usermods, to only enabled WLEDMM specific code in the "right" fork. Its not defined in AC WLED.
+#define _MoonModules_WLED_
+
 //WLEDMM + Moustachauve/Wled-Native 
 // You can define custom product info from build flags.
 // This is useful to allow API consumer to identify what type of WLED version