diff --git a/core/modules/user/user.js b/core/modules/user/user.js
index e988f747738..a2ce834feba 100644
--- a/core/modules/user/user.js
+++ b/core/modules/user/user.js
@@ -109,6 +109,7 @@
    * @return {object}
    */
   Drupal.evaluatePasswordStrength = function (password, translate) {
+    password = password.trim();
     var indicatorText;
     var indicatorClass;
     var weaknesses = 0;