diff --git a/.github/workflows/docker-publish.yaml b/.github/workflows/docker-publish.yaml
index c337897..f215c73 100644
--- a/.github/workflows/docker-publish.yaml
+++ b/.github/workflows/docker-publish.yaml
@@ -11,7 +11,7 @@ on:
 
 env:
   # Use docker.io for Docker Hub if empty
-  REGISTRY:
+  REGISTRY: docker.io
   # github.repository as <account>/<repo>
   IMAGE_NAME: slic/kubectl-watch