diff --git a/.github/workflows/api-diff.yml b/.github/workflows/api-diff.yml
index f855380f9e..e87f3f334f 100644
--- a/.github/workflows/api-diff.yml
+++ b/.github/workflows/api-diff.yml
@@ -70,6 +70,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: ${{ steps.pr.outputs.sha }}
+          submodules: recursive
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4