diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b5f47f6..ee346ade 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -235,7 +235,7 @@ jobs:
         name: Docker publish
         runs-on: ubuntu-latest
         needs: build
-        if: startsWith('refs/tags/v', github.ref) || github.ref == 'refs/heads/main' || (github.event_name == 'pull_request' && github.event.pull_request.draft == false)
+        if: (startsWith('refs/tags/v', github.ref) || github.ref == 'refs/heads/main' || (github.event_name == 'pull_request' && github.event.pull_request.draft == false)) && (vars.DOCKER_USERNAME != '') && (vars.GITLAB_USERNAME != '')
         env:
             DOCKER_ARM64: docker.io/${{ github.repository }}:${{ (github.head_ref != '' && format('merge-{0}-{1}', github.event.number, github.event.pull_request.user.login)) || github.ref_name }}-${{ github.sha }}-arm64v8
             DOCKER_AMD64: docker.io/${{ github.repository }}:${{ (github.head_ref != '' && format('merge-{0}-{1}', github.event.number, github.event.pull_request.user.login)) || github.ref_name }}-${{ github.sha }}-amd64