diff --git a/.github/workflows/pr_check.yml b/.github/workflows/pr_check.yml
index f80b9e0..41016c9 100644
--- a/.github/workflows/pr_check.yml
+++ b/.github/workflows/pr_check.yml
@@ -30,7 +30,7 @@ jobs:
       - name: Connect private iap package
         uses: webfactory/ssh-agent@v0.8.0
         id: fetch-iap
-        if: steps.PR.outputs.number == 'null' || github.event.pull_request.head.repo.full_name == github.repository
+        if: steps.PR.outputs.number != 'null' && github.event.pull_request.head.repo.full_name != github.repository
         with:
           ssh-private-key: ${{ secrets.M3_LIGHTMETER_IAP_KEY }}