diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 61005af2df..a9b3cda357 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -13,11 +13,12 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 2
+      - run: git fetch origin master:master
       - name: changed files
         id: files
         run: |
           ANY_CHANGED=false
-          ALL_CHANGED_FILES=$(git diff --name-only origin/${{ github.base_ref }}..${{ github.sha }} -- streams/ | tr '\n' ' ')
+          ALL_CHANGED_FILES=$(git diff --name-only master -- streams/ | tr '\n' ' ')
           if [ -n "${ALL_CHANGED_FILES}" ]; then
             ANY_CHANGED=true
           fi