diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ee5dd098e9..b46b1d619e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,6 +18,7 @@ on:
 jobs:
  Fuzzing:
    runs-on: ubuntu-latest
+   if: github.repository == 'systemd/systemd'
    steps:
    - name: Build Fuzzers
      id: build