diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 4c15afcc..9ac96628 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -2,8 +2,6 @@ on:
   push:
     paths:
       - 'steamtinkerlaunch'
-    branches-ignore:
-      - 'refs/pull/**'
   pull_request:
     types: [opened, reopened, synchronize]
     paths:
@@ -16,6 +14,9 @@ jobs:
   shellcheck:
     name: ShellCheck
     runs-on: ubuntu-latest
+    # Source: https://stackoverflow.com/a/65946732/1952066
+    # a push event from the origin repo, or a PR from external repo
+    if: ${{ github.event_name == 'push' || github.event.pull_request.head.repo.full_name != 'sonic2kk/steamtinkerlaunch' }}
     steps:
       - uses: actions/checkout@v4
       - name: Run ShellCheck