diff --git a/test/py/Makefile.am b/test/py/Makefile.am
index 0d159a2..9155179 100644
--- a/test/py/Makefile.am
+++ b/test/py/Makefile.am
@@ -24,4 +24,4 @@
 	$(THRIFT) -py $<
 
 clean-local:
-	-rm -rf gen-py
+	$(RM) -r gen-py