diff --git a/mozilla/nsprpub/Makefile.in b/mozilla/nsprpub/Makefile.in
index 9273b16db27..42f07dd7c44 100644
--- a/mozilla/nsprpub/Makefile.in
+++ b/mozilla/nsprpub/Makefile.in
@@ -85,6 +85,7 @@ distclean::
 	@echo "cd pr/tests; $(MAKE) $@"
 	@$(MAKE) -C pr/tests $@
 	rm -f config/autoconf.mk
+	rm -f `cat unallmakefiles` unallmakefiles
 
 release::
 	echo $(BUILD_NUMBER) > $(RELEASE_DIR)/$(BUILD_NUMBER)/version.df