diff --git a/UI/WebServerResources/js/Mailer/sgIMIP.directive.js b/UI/WebServerResources/js/Mailer/sgIMIP.directive.js
index fdedc31fa..1078e11ae 100644
--- a/UI/WebServerResources/js/Mailer/sgIMIP.directive.js
+++ b/UI/WebServerResources/js/Mailer/sgIMIP.directive.js
@@ -7,7 +7,6 @@
   /**
    * sgIMIP - A directive to handle IMIP actions on emails
    * @memberof SOGo.MailerUI
-   * @ngInject
    * @example:
 
    */
@@ -15,40 +14,46 @@
     return {
       restrict: 'A',
       link: link,
-      controller: controller
+      controller: 'sgImipController'
     };
 
     function link(scope, iElement, attrs, ctrl) {
       ctrl.pathToAttachment = attrs.sgImipPath;
     }
+  }
 
-    controller.$inject = ['$scope', 'User'];
-    function controller($scope, User) {
-      var vm = this;
+  /**
+   * @ngInject
+   */
+  sgImipController.$inject = ['$scope', 'User'];
+  function sgImipController($scope, User) {
+    var vm = this;
 
-      $scope.delegateInvitation = false;
-      $scope.delegatedTo = '';
-      $scope.searchText = '';
+    $scope.delegateInvitation = false;
+    $scope.delegatedTo = '';
+    $scope.searchText = '';
 
-      $scope.userFilter = function($query) {
-        return User.$filter($query);
-      };
+    $scope.userFilter = function($query) {
+      return User.$filter($query);
+    };
 
-      $scope.iCalendarAction = function(action) {
-        var data;
+    $scope.iCalendarAction = function(action) {
+      var data;
 
-        if (action == 'delegate') {
-          data = {receiveUpdates: false,
-                  delegatedTo: $scope.delegatedTo.c_email};
-        }
+      if (action == 'delegate') {
+        data = {
+          receiveUpdates: false,
+          delegatedTo: $scope.delegatedTo.c_email
+        };
+      }
 
-        $scope.message.$imipAction(vm.pathToAttachment, action, data);
-      };
-    }
+      $scope.message.$imipAction(vm.pathToAttachment, action, data);
+    };
   }
 
   angular
     .module('SOGo.MailerUI')
+    .controller('sgImipController', sgImipController)
     .directive('sgImip', sgImip);
 })();