diff --git a/examples/custom-controller/Makefile b/examples/custom-controller/Makefile
index a66cf01f6..2e6783689 100644
--- a/examples/custom-controller/Makefile
+++ b/examples/custom-controller/Makefile
@@ -32,7 +32,7 @@ container: server
 	docker build --pull -t $(PREFIX)-$(ARCH):$(TAG) .
 
 push: container
-	gcloud docker push $(PREFIX)-$(ARCH):$(TAG)
+	gcloud docker -- push $(PREFIX)-$(ARCH):$(TAG)
 
 clean:
 	rm -f server
diff --git a/images/nginx-slim/Makefile b/images/nginx-slim/Makefile
index 2c783c60d..1f9cbd939 100644
--- a/images/nginx-slim/Makefile
+++ b/images/nginx-slim/Makefile
@@ -8,7 +8,7 @@ container:
 	docker build --pull -t $(PREFIX):$(TAG) .
 
 push: container
-	gcloud docker push $(PREFIX):$(TAG)
+	gcloud docker -- push $(PREFIX):$(TAG)
 
 clean:
 	docker rmi -f $(PREFIX):$(TAG) || true