diff --git a/.github/workflows/doc_checks.yml b/.github/workflows/doc_checks.yml
index d8ddd47abdd1..4a44c33dfa91 100644
--- a/.github/workflows/doc_checks.yml
+++ b/.github/workflows/doc_checks.yml
@@ -83,5 +83,6 @@ jobs:
     - name: Spelling
       shell: bash -l {0}
       run: |
+        rm -rf build/html_extra # avoid WARNING: html_extra_path entry '../build/html_extra' is placed inside outdir
         make spelling
       working-directory: ./doc