diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index ffc38c1..abd68bc 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -104,7 +104,7 @@ jobs:
           echo "tag=$prev" >> "$GITHUB_OUTPUT"
 
       - name: Compute lowercased image repo
-        if: ${{ github.event.inputs.docker_release == 'true' }}
+        if: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.docker_release == 'true' || github.event_name == 'pull_request' }}
         run: |
           echo "IMAGE_REPO=${{ secrets.REGISTRY }}/$(echo '${{ github.repository }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV