diff --git a/headers/private/app/ServerProtocol.h b/headers/private/app/ServerProtocol.h
index 52b9a3057d..6feea20825 100644
--- a/headers/private/app/ServerProtocol.h
+++ b/headers/private/app/ServerProtocol.h
@@ -284,7 +284,8 @@ AS_ROOTLAYER_HIDE_WINBORDER,
 AS_ROOTLAYER_DO_INVALIDATE,
 AS_ROOTLAYER_DO_REDRAW,
 AS_ROOTLAYER_LAYER_MOVE,
-AS_ROOTLAYER_LAYER_RESIZE
+AS_ROOTLAYER_LAYER_RESIZE,
+AS_ROOTLAYER_ADD_TO_SUBSET
 };
 
 #define AS_PATTERN_SIZE 8