diff --git a/platypush/backend/http/__init__.py b/platypush/backend/http/__init__.py
index 3d70c31cae..8ecaf09b24 100644
--- a/platypush/backend/http/__init__.py
+++ b/platypush/backend/http/__init__.py
@@ -271,7 +271,8 @@ class HttpBackend(Backend):
                         enabled_plugins[plugin] = conf
 
             return render_template('index.html', plugins=enabled_plugins, hidden_plugins=hidden_plugins,
-                                   token=Config.get('token'), websocket_port=self.websocket_port)
+                                   token=Config.get('token'), websocket_port=self.websocket_port,
+                                   has_ssl=self.ssl_cert is not None)
 
 
         @app.route('/widget/<widget>', methods=['POST'])
diff --git a/platypush/backend/http/static/js/application.js b/platypush/backend/http/static/js/application.js
index b8bbe3034a..9a87e6a147 100644
--- a/platypush/backend/http/static/js/application.js
+++ b/platypush/backend/http/static/js/application.js
@@ -9,7 +9,7 @@ $(document).ready(function() {
 
     var initWebsocket = function() {
         try {
-            url_prefix = window.ssl_cert ? 'wss://' : 'ws://';
+            url_prefix = window.has_ssl ? 'wss://' : 'ws://';
             websocket = new WebSocket(url_prefix  + window.location.hostname + ':' + window.websocket_port);
         } catch (err) {
             websocket = undefined;