diff --git a/action.yml b/action.yml
index 2183ff4..6d2cc2a 100644
--- a/action.yml
+++ b/action.yml
@@ -250,7 +250,7 @@ runs:
           fi
         done
         files="$(echo ${changed_files})"
-        echo "file=${files// /,}" >> $GITHUB_OUTPUT
+        echo "file=${files// / }" >> $GITHUB_OUTPUT
 
     - uses: gaurav-nelson/github-action-markdown-link-check@v1
       if: inputs.readme_enabled == 'true' && inputs.validate_readme == 'true'