diff --git a/.github/workflows/benchmark-pull-request.yml b/.github/workflows/benchmark-pull-request.yml
index 1aa2b6271719b..2e2e83eb132de 100644
--- a/.github/workflows/benchmark-pull-request.yml
+++ b/.github/workflows/benchmark-pull-request.yml
@@ -115,7 +115,7 @@ jobs:
           headRepo=$(echo '${{ steps.get_pr.outputs.result }}' | jq -r '.headRepoFullName')
           headRef=$(echo '${{ steps.get_pr.outputs.result }}' | jq -r '.headRef')
           echo "prHeadRepo=$headRepo" >> $GITHUB_ENV
-          echo "prheadRef=$headRef" >> $GITHUB_ENV
+          echo "prHeadRef=$headRef" >> $GITHUB_ENV
       - name: Checkout PR Repo
         uses: actions/checkout@v2
         with: