diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 68042a95d..2a304f159 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -148,6 +148,7 @@ jobs:
 
       - name: Upload to S3
         run: aws s3 sync build/artifact s3://flycast-builds/${{ matrix.config.destDir }}/${GITHUB_REF#refs/}-$GITHUB_SHA --acl public-read --follow-symlinks
+        shell: bash
         if: ${{ steps.aws-credentials.outputs.aws-account-id != '' }}
 
       - name: Upload symbols to S3