diff --git a/app/assets/javascripts/discourse/lib/user-search.js.es6 b/app/assets/javascripts/discourse/lib/user-search.js.es6
index 790a00ff091..068282c75b9 100644
--- a/app/assets/javascripts/discourse/lib/user-search.js.es6
+++ b/app/assets/javascripts/discourse/lib/user-search.js.es6
@@ -88,11 +88,6 @@ export default function userSearch(options) {
   currentTerm = term;
 
   return new Ember.RSVP.Promise(function(resolve) {
-    // TODO site setting for allowed regex in username
-    if (term.match(/[^a-zA-Z0-9_\.]/)) {
-      resolve([]);
-      return;
-    }
     if (((new Date() - cacheTime) > 30000) || (cacheTopicId !== topicId)) {
       cache = {};
     }