diff --git a/.github/workflows/pr-extension-build.yml b/.github/workflows/pr-extension-build.yml
index d7deb10..b0bd85e 100644
--- a/.github/workflows/pr-extension-build.yml
+++ b/.github/workflows/pr-extension-build.yml
@@ -40,7 +40,7 @@ jobs:
           path: '*.vsix'
 
       - name: Comment on PR with artifact link
-        if: github.event_name == 'pull_request'
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
         uses: actions/github-script@v7
         with:
           script: |