diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index 30e97ad9b..74ea93585 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -63,7 +63,7 @@ jobs:
             echo "registry=${{ vars.PROVIDER_PROXY_REGISTRY }}" >> $GITHUB_ENV
             echo "app=provider-proxy" >> $GITHUB_ENV
           else
-            echo "Error: Unknown tag format"
+            echo "Error: Unknown tag format = $tag"
             exit 1
           fi