diff --git a/bacnet-stack/Makefile b/bacnet-stack/Makefile
index 656c73b2..5ee0f29c 100644
--- a/bacnet-stack/Makefile
+++ b/bacnet-stack/Makefile
@@ -93,3 +93,4 @@ clean:
 	$(MAKE) -s -C lib clean
 	$(MAKE) -s -C demo clean
 	$(MAKE) -s -C demo/router clean
+	$(MAKE) -s -C demo/gateway clean