diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 122929d..874c8ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,9 @@ on:
 
 jobs:
   xmllint:
+    # Don't run the cron job on forks.
+    if: ${{ github.event_name != 'schedule' || github.event.repository.fork == false }}
+
     name: 'Check install and XML'
     runs-on: ubuntu-latest