diff --git a/mozilla/config/Makefile.in b/mozilla/config/Makefile.in
index 3f27361a932..e7fc4ab6376 100644
--- a/mozilla/config/Makefile.in
+++ b/mozilla/config/Makefile.in
@@ -93,11 +93,11 @@ HEADERS		+= $(srcdir)/os2/dirent.h
 endif
 
 export:: $(TARGETS) $(HEADERS)
-	$(INSTALL) -m 444 $(HEADERS) $(DIST)/include
+	$(INSTALL) $(IFLAGS1) $(HEADERS) $(DIST)/include
 	$(PERL) -I$(MOZILLA_DIR)/config $(MOZILLA_DIR)/config/build-list.pl $(PUBLIC)/.headerlist $(HEADERS)
 	-rm -f $(FINAL_LINK_COMPS) $(FINAL_LINK_LIBS) $(FINAL_LINK_COMP_NAMES)
 	-rm -f $(DIST)/bin/chrome/chromelist.txt
-	$(NSINSTALL) -t -m 444 $(DEPTH)/mozilla-config.h $(DIST)/sdk/
+	$(NSINSTALL) -t $(IFLAGS1) $(DEPTH)/mozilla-config.h $(DIST)/sdk/
 
 
 # Create mini-SDK directory for NSPR