diff --git a/front_end/sdk/NetworkManager.js b/front_end/sdk/NetworkManager.js
index ab95c758b7..6a28227aea 100644
--- a/front_end/sdk/NetworkManager.js
+++ b/front_end/sdk/NetworkManager.js
@@ -456,11 +456,11 @@ WebInspector.NetworkDispatcher.prototype = {
      * @override
      * @param {!NetworkAgent.RequestId} requestId
      * @param {string} requestURL
+     * @param {!NetworkAgent.Initiator=} initiator
      */
-    webSocketCreated: function(requestId, requestURL)
+    webSocketCreated: function(requestId, requestURL, initiator)
     {
-        // FIXME: WebSocket MUST have initiator info.
-        var networkRequest = new WebInspector.NetworkRequest(this._manager._target, requestId, requestURL, "", "", "", null);
+        var networkRequest = new WebInspector.NetworkRequest(this._manager._target, requestId, requestURL, "", "", "", initiator || null);
         networkRequest.setResourceType(WebInspector.resourceTypes.WebSocket);
         this._startNetworkRequest(networkRequest);
     },