diff --git a/.github/workflows/pr-modified-files.yml b/.github/workflows/pr-modified-files.yml
index f0940bb8cec..09841f73fc6 100644
--- a/.github/workflows/pr-modified-files.yml
+++ b/.github/workflows/pr-modified-files.yml
@@ -99,7 +99,7 @@ jobs:
             MESSAGE+=" You can [read more here](https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md#contributing-libdts-fixes)."
             MESSAGE+=" For house-keeping purposes, this pull request will be closed."
 
-            gh pr close $issue --repo ${{ github.repository }} --comment "$MESSAGE"
+            gh pr close ${{ github.event.pull_request.number }} --repo ${{ github.repository }} --comment "$MESSAGE"
             exit 1 # Stop the pipeline; we just closed the PR.
           fi