diff --git a/action.yml b/action.yml
index 388a455..62ffd50 100644
--- a/action.yml
+++ b/action.yml
@@ -55,8 +55,10 @@ runs:
       shell: bash
     - id: default
       run: |
-        if [[ "${{ steps.current_branch.outputs.current_branch }}" == "${{ steps.current_branch.outputs.base_ref_branch }}" ]]; then
-          echo "::set-output name=is_default::true"
+        if [[ -z "${{ steps.branch.outputs.head_ref_branch }}" ]]; then
+          if [[ "${{ steps.current_branch.outputs.current_branch }}" == "${{ steps.current_branch.outputs.ref_branch }}" ]]; then
+            echo "::set-output name=is_default::true"
+          fi
         else
           echo "::set-output name=is_default::false"
         fi