diff --git a/pathtools/GNUmakefile b/pathtools/GNUmakefile
index 2337386..9ee3f21 100644
--- a/pathtools/GNUmakefile
+++ b/pathtools/GNUmakefile
@@ -10,7 +10,7 @@ clean:
 	rm -f $(TARGETS) *.bak core foo bar baz *.ps
 
 distclean: clean
-	rm -f customize
+	rm -f customize GNUmakerules GNUmakevars
 
 install: $(BINDIR) \
     $(BINDIR)/apppath \