diff --git a/.github/workflows/check-formatting.yml b/.github/workflows/check-formatting.yml
index ad5be47a3..acd0a0281 100644
--- a/.github/workflows/check-formatting.yml
+++ b/.github/workflows/check-formatting.yml
@@ -9,6 +9,7 @@ jobs:
       image: ubuntu:19.10
 
     steps:
+    - uses: actions/checkout@v1
     - name: apt-get update
       run: apt-get update