diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index fffbbd3b..40ebefb1 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -44,6 +44,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
 
       - name: Run Claude (review only)
         uses: anthropics/claude-code-action@v1