diff --git a/src/views/app.js b/src/views/app.js
index dc4d379de..918bd93a8 100644
--- a/src/views/app.js
+++ b/src/views/app.js
@@ -905,10 +905,20 @@ angular.module('Application').controller('AppController', ['$scope', '$location'
 
         crontab: '',
 
+        crontabDefault: ''
+            + '# +---------------- minute (0 - 59)\n'
+            + '# |  +------------- hour (0 - 23)\n'
+            + '# |  |  +---------- day of month (1 - 31)\n'
+            + '# |  |  |  +------- month (1 - 12)\n'
+            + '# |  |  |  |  +---- day of week (0 - 6) (Sunday=0 or 7)\n'
+            + '# |  |  |  |  |\n'
+            + '# *  *  *  *  *  command to be executed\n\n',
+
         show: function () {
             $scope.cronForm.$setPristine();
             $scope.cron.error = {};
             $scope.cron.crontab = $scope.app.crontab;
+            if ($scope.cron.crontab === null)  $scope.cron.crontab = $scope.cron.crontabDefault; // only when null, not when ''
         },
 
         submit: function () {