diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index e467fa75..c1822495 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -51,7 +51,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
         with:
-          ref: ${{ github.head_ref }}
+          submodules: recursive
       - name: Debug Build
         shell: bash
         run: make