diff --git a/.github/workflows/image_build_push.yml b/.github/workflows/image_build_push.yml
index 3db0f30..7a87742 100644
--- a/.github/workflows/image_build_push.yml
+++ b/.github/workflows/image_build_push.yml
@@ -67,7 +67,7 @@ jobs:
             echo "Branch name: branch_name=${base_ref#refs/heads/}"
             echo "branch_name=${base_ref#refs/heads/}" >> "$GITHUB_OUTPUT"
           elif [ "${{ github.ref_type }}" == "branch" ]; then
-            echo "branch_name=:${GITHUB_REF##*/}" >> "$GITHUB_OUTPUT"    
+            echo "branch_name=${GITHUB_REF##*/}" >> "$GITHUB_OUTPUT"    
           fi
 
   build: