diff --git a/.gitea/workflows/docs-precheck.yml b/.gitea/workflows/docs-precheck.yml
index 3176c1546..3539c30ea 100644
--- a/.gitea/workflows/docs-precheck.yml
+++ b/.gitea/workflows/docs-precheck.yml
@@ -31,9 +31,9 @@ jobs:
         id: changed-files
         run: |
           BASE_SHA="${{ gitea.event.pull_request.base.sha }}"
-          changed=$(git diff --name-only ${BASE_SHA}...HEAD | grep -E '\.(html|htm)$' | tr '\n' ' ')
-          echo "files=$changed" >> $GITEA_OUTPUT
-          echo "CHANGED_FILES=$changed" >> $GITEA_ENV
+          changed=$(git diff --name-only ${BASE_SHA}...HEAD | grep -E '\.(html|htm)$' | tr '\n' ' ' || true)
+          echo "files=$changed" >> $GITHUB_OUTPUT
+          echo "CHANGED_FILES=$changed" >> $GITHUB_ENV
           echo "Changed HTML files: $changed"
 
       - name: Run underscore check