diff --git a/src/progress.js b/src/progress.js
index f8d9d4680..ef2b0b94d 100644
--- a/src/progress.js
+++ b/src/progress.js
@@ -17,7 +17,8 @@ var assert = require('assert'),
 // otherwise no such operation is currently ongoing
 var progress = {
     update: null,
-    backup: null
+    backup: null,
+    migrate: null
 };
 
 // We use -1 for percentage to indicate errors
diff --git a/webadmin/src/js/update.js b/webadmin/src/js/update.js
index 28d3e9f87..2f3e35d5c 100644
--- a/webadmin/src/js/update.js
+++ b/webadmin/src/js/update.js
@@ -17,7 +17,7 @@ app.controller('Controller', ['$scope', '$http', '$interval', function ($scope,
         $http.get('/api/v1/cloudron/progress').success(function(data, status) {
             if (status === 404) return; // just wait until we create the progress.json on the server side
             if (status !== 200 || typeof data !== 'object') return console.error(status, data);
-            if (data.update === null && data.migrate === null) return $scope.loadWebadmin();
+            if (!data.update && !data.migrate) return $scope.loadWebadmin();
 
             if (data.update) {
                 if (data.update.percent === -1) {