diff --git a/src/views/users.js b/src/views/users.js
index 6d980b1db..39619339d 100644
--- a/src/views/users.js
+++ b/src/views/users.js
@@ -15,7 +15,7 @@ angular.module('Application').controller('UsersController', ['$scope', '$locatio
     $scope.userInfo = Client.getUserInfo();
 
     $scope.groupMembers = function (group) {
-        return group.userIds.map(function (uid) { return $scope.usersById[uid].username || $scope.usersById[uid].email; }).join(', ');
+        return group.userIds.filter(function (uid) { return !!$scope.usersById[uid]; }).map(function (uid) { return $scope.usersById[uid].username || $scope.usersById[uid].email; }).join(', ');
     };
 
     $scope.userremove = {