diff --git a/gui/default/syncthing/core/syncthingController.js b/gui/default/syncthing/core/syncthingController.js
index 683504c24..f61f0b0cf 100755
--- a/gui/default/syncthing/core/syncthingController.js
+++ b/gui/default/syncthing/core/syncthingController.js
@@ -1098,7 +1098,7 @@ angular.module('syncthing.core')
             }
 
             // Disconnected
-            if (!unused && $scope.deviceStats[deviceCfg.deviceID].lastSeenDays >= 7) {
+            if (!unused && $scope.deviceStats[deviceCfg.deviceID].lastSeenDays && $scope.deviceStats[deviceCfg.deviceID].lastSeenDays >= 7) {
                 return status + 'disconnected-inactive';
             } else {
                 return status + 'disconnected';