diff --git a/Makefile.moddir_rules b/Makefile.moddir_rules
index f2ea69c203..2bd809d13c 100644
--- a/Makefile.moddir_rules
+++ b/Makefile.moddir_rules
@@ -34,7 +34,7 @@ endif
 
 include $(ASTTOPDIR)/Makefile.rules
 
-comma:=,
+#comma:=,	# not used
 
 # Both C++ and C++ sources need their module name in AST_MODULE
 # We also pass whatever _INCLUDE list is generated by menuselect