diff --git a/.github/workflows/opentofu.yml b/.github/workflows/opentofu.yml
index c329264..5d94503 100644
--- a/.github/workflows/opentofu.yml
+++ b/.github/workflows/opentofu.yml
@@ -15,4 +15,7 @@ permissions:
 
 jobs:
   opentofu:
+    if: >-
+      github.event_name != 'pull_request' ||
+      github.event.pull_request.head.repo.full_name == github.repository
     uses: makeitworkcloud/shared-workflows/.github/workflows/opentofu.yml@main