diff --git a/Makefile b/Makefile
index 2982e62c..b92a1a33 100644
--- a/Makefile
+++ b/Makefile
@@ -130,7 +130,9 @@ clean :
 	rm -f $(SKYNET_BUILD_PATH)/skynet $(CSERVICE_PATH)/*.so $(LUA_CLIB_PATH)/*.so
 
 cleanall: clean
+ifneq (,$(wildcard 3rd/jemalloc/Makefile))
 	cd 3rd/jemalloc && $(MAKE) clean
+endif
 	cd 3rd/lua && $(MAKE) clean
 	rm -f $(LUA_STATICLIB)