diff --git a/static/js/app.js b/static/js/app.js
index c55cf5eb5..4e51e4708 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -2465,6 +2465,7 @@ quayApp.directive('dockerAuthDialog', function (Config) {
     controller: function($scope, $element) {
       var updateCommand = function() {
         var escape = function(v) {
+          if (!v) { return v; }
           return v.replace('$', '\\$');
         };
         $scope.command = 'docker login -e="." -u="' + escape($scope.username) +