diff --git a/.github/workflows/prebuild.yml b/.github/workflows/prebuild.yml
index 22e03a12c..f6d1dfb26 100644
--- a/.github/workflows/prebuild.yml
+++ b/.github/workflows/prebuild.yml
@@ -9,6 +9,7 @@ on:
 jobs:
   block-fixup:
     name: Block fixup
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4