diff --git a/.github/workflows/generate.yaml b/.github/workflows/generate.yaml
index 549d3c9c3..0d67bf7f6 100644
--- a/.github/workflows/generate.yaml
+++ b/.github/workflows/generate.yaml
@@ -47,4 +47,4 @@ jobs:
             This PR was created by [this workflow run](https://github.com/rhysd/actionlint/actions/runs/${{ github.run_id }}) automatically.
             List of workflow runs is [here](https://github.com/rhysd/actionlint/actions/workflows/generate.yaml).
           assignees: rhysd
-        if: ${{ steps.diff.outputs.pr == 'true' }}
+        if: ${{ steps.diff.outputs.pr == 'true' && github.repository == 'rhysd/actionlint' }}