diff --git a/.github/workflows/checkformat.yml b/.github/workflows/checkformat.yml
index 755d6a22..0119fc56 100644
--- a/.github/workflows/checkformat.yml
+++ b/.github/workflows/checkformat.yml
@@ -15,4 +15,5 @@ jobs:
         uses: actions/checkout@v6
       - name: Check format
         run: |
+          sudo apt install clang-format
           contrib/checkformat.bash