diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index d279603d..4cca5645 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -41,7 +41,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload SARIF results to code scanning
-        if: always()
+if: always() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository)
         uses: github/codeql-action/upload-sarif@v3
         with:
           sarif_file: zizmor.sarif