diff --git a/.github/workflows/periodic_update.yml b/.github/workflows/periodic_update.yml
index 5bd94c7eb06..8106057cce4 100644
--- a/.github/workflows/periodic_update.yml
+++ b/.github/workflows/periodic_update.yml
@@ -28,7 +28,7 @@ jobs:
           wget http://git.savannah.gnu.org/cgit/config.git/plain/config.guess && chmod +x config.guess
           wget http://git.savannah.gnu.org/cgit/config.git/plain/config.sub && chmod +x config.sub
       # Display changes, only to follow along in the logs.
-      - run: git diff config.guess config.sub
+      - run: git diff -- config.guess config.sub
       - name: Double check if files are modified
         run: git status --ignored
       - name: Create Pull Request