diff --git a/engine/src/flutter/.github/workflows/mirror.yml b/engine/src/flutter/.github/workflows/mirror.yml
index 4c86ce357bc..4d78140daf4 100644
--- a/engine/src/flutter/.github/workflows/mirror.yml
+++ b/engine/src/flutter/.github/workflows/mirror.yml
@@ -13,6 +13,7 @@ jobs:
     permissions:
       pull-requests: write
     runs-on: ubuntu-latest
+    if: ${{ github.repository == 'flutter/engine' }}
     name: Mirror main branch to master branch
     steps:
       - name: Mirror action step