diff --git a/.github/workflows/detect_api_changes.yml b/.github/workflows/detect_api_changes.yml
index 95558a9612..6a59d772eb 100644
--- a/.github/workflows/detect_api_changes.yml
+++ b/.github/workflows/detect_api_changes.yml
@@ -35,7 +35,7 @@ jobs:
         NEW="${{ env.source }}~${{ env.githubRepo }}"
         
         # Release branches get compared to the last tag instead of the target branch
-        if [[ "${{ github.head_ref || env.noTargetBranch }}" == release/* ]]
+        if [[ "${{ env.targetBranchName || env.noTargetBranch }}" == release/* ]]
         then
             LATEST_TAG="$(git describe --tags --abbrev=0)"
             OLD="$LATEST_TAG~${{ env.githubRepo }}"