diff --git a/.github/workflows/apidoc.yml b/.github/workflows/apidoc.yml
index 147c63a493..0507ed7c53 100644
--- a/.github/workflows/apidoc.yml
+++ b/.github/workflows/apidoc.yml
@@ -4,6 +4,7 @@ on:
     branches: master
 jobs:
   apidoc:
+    if: github.repository == 'Homebrew/brew'
     runs-on: ubuntu-latest
     steps:
       - uses: Homebrew/actions/git-ssh@master