diff --git a/makefile.gfx b/makefile.gfx
index fd842e6cf..4382ad014 100644
--- a/makefile.gfx
+++ b/makefile.gfx
@@ -468,6 +468,7 @@ cleanmcheader:
 
 $(MC_HEADER_OUT) : $(MC_HEADER_IN)
 	@$(CP) $(MC_HEADER_IN) $(MC_HEADER_OUT)
+	@$(ATTRIB) -r $(MC_HEADER_OUT)
 
 GRAF_DIRS_TO_MAKE	+= $(MC_HEADER_OUT_DIR)
 GFX_DATA_OUT		+= $(MC_HEADER_OUT)