diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 834a10c..ff1ea79 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -26,6 +26,7 @@ jobs:
       - name: Fetch latest kernel
         if: steps.check.outputs.sha != ''
         run: |
+          git submodule update --init --depth=1 linux-sources
           echo "sha ${{steps.check.outputs.sha}}"
           cd linux-sources
           echo "fetch"