diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index ce993f3..4d99ebf 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -12,7 +12,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Install packages
         run: npm install exiftool-vendored@26