diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index b5fd10352..c09f7eb36 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -7,5 +7,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/labeler@v2
+      if: github.base_ref == null
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"