diff --git a/lib/legacy/legacy-data-mixin.js b/lib/legacy/legacy-data-mixin.js
index 2d18397d6a..3c61115f25 100644
--- a/lib/legacy/legacy-data-mixin.js
+++ b/lib/legacy/legacy-data-mixin.js
@@ -75,7 +75,8 @@ export const LegacyDataMixin = dedupingMixin(superClass => {
    * @constructor
    * @extends {superClass}
    * @unrestricted
-   * @private   */
+   * @private
+   */
   class LegacyDataMixin extends superClass {
     /**
      * Overrides `Polymer.PropertyEffects` to add `undefined` argument