diff --git a/contrib/fbmerge/Makefile.am b/contrib/fbmerge/Makefile.am
index cc480a7..945b6e4 100755
--- a/contrib/fbmerge/Makefile.am
+++ b/contrib/fbmerge/Makefile.am
@@ -10,6 +10,6 @@ fbmerge_LDADD = ../../src/libfastbit.la
 #
 ../../src/libfastbit.la::
 	cd ../../src && $(MAKE) libfastbit.la
-distclean: distclean-am
-	-rm -rf ./$(DEPDIR) .ibis
-	-rm -f Makefile
+
+distclean-local:
+	-rm -rf .ibis