diff --git a/lib/elements/dom-module.js b/lib/elements/dom-module.js
index 76b801ebe5..02c41e7203 100644
--- a/lib/elements/dom-module.js
+++ b/lib/elements/dom-module.js
@@ -31,7 +31,7 @@ function setModule(id, module) {
  * Retrieves a dom-module from the global registry by id.
  *
  * @param {string} id dom-module id
- * @return {DomModule!}
+ * @return {DomModule!} dom-module instance
  */
 function findModule(id) {
   return modules[id] || lcModules[id.toLowerCase()];