diff --git a/lib/app/views/partials/design.html b/lib/app/views/partials/design.html
index 99b4d8dd..169c27ec 100644
--- a/lib/app/views/partials/design.html
+++ b/lib/app/views/partials/design.html
@@ -32,7 +32,7 @@ <h3 class="sg" ng-hide="showRelated">All variables</h3>
 
     </ul>
     <div class="sg action-footer" ng-if="socketService.isAvailable()">
-      <button class="sg button primary" ng-click="saveVariables()">Save changes</button>
+      <button class="sg button primary" ng-disabled="!socketService.isConnected()" ng-click="saveVariables()">Save changes</button>
       <button class="sg button" ng-click="resetLocal()">Reset local changes</button>
     </div>
     <div class="sg action-footer" ng-hide="socketService.isAvailable()">