diff --git a/.github/workflows/size.yml b/.github/workflows/size.yml
index 23aedc1f1..1e01646b8 100644
--- a/.github/workflows/size.yml
+++ b/.github/workflows/size.yml
@@ -19,7 +19,8 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
       - run: npm i -g --force corepack && corepack enable
       - uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4.2.0
         with: