diff --git a/.github/workflows/alphabetise.yml b/.github/workflows/alphabetise.yml
index 5b4f233c61..ba236d0a29 100644
--- a/.github/workflows/alphabetise.yml
+++ b/.github/workflows/alphabetise.yml
@@ -29,6 +29,8 @@ jobs:
           mv antora-playbook-sorted.yml antora-playbook.yml
 
       - name: Create Pull Request
+        # Skip main in forks
+        if: "github.repository == 'quarkiverse/quarkiverse-docs' && endsWith(github.ref, '/main')"
         run: |
           git checkout -b alpha-${{ github.run_id }}
           git add antora-playbook.yml