diff --git a/src/Microsoft.AspNetCore.SignalR.Client.TS/LongPollingTransport.ts b/src/Microsoft.AspNetCore.SignalR.Client.TS/LongPollingTransport.ts
index 5ecf60cbc5..75e020b152 100644
--- a/src/Microsoft.AspNetCore.SignalR.Client.TS/LongPollingTransport.ts
+++ b/src/Microsoft.AspNetCore.SignalR.Client.TS/LongPollingTransport.ts
@@ -13,17 +13,16 @@ class LongPollingTransport implements ITransport {
     }
 
     connect(url: string, queryString: string): Promise<void> {
-
         return Promise.resolve();
     }
 
-    private poll(): void {
-        this.pollXhr.open("GET", , true);
+    private poll(url: string): void {
+        this.pollXhr.open("GET", url, true);
         this.pollXhr.send();
         this.pollXhr.onload = () => {
             if (this.pollXhr.status >= 200 && this.pollXhr.status < 300) {
                 this.receiveCallback(this.pollXhr.response);
-                this.poll();
+                this.poll(url);
             }
             else {
                 //TODO: handle error
diff --git a/src/Microsoft.AspNetCore.SignalR.Client.TS/RpcConnection.ts b/src/Microsoft.AspNetCore.SignalR.Client.TS/RpcConnection.ts
index 45bc03de9b..29ff6aaedb 100644
--- a/src/Microsoft.AspNetCore.SignalR.Client.TS/RpcConnection.ts
+++ b/src/Microsoft.AspNetCore.SignalR.Client.TS/RpcConnection.ts
@@ -19,9 +19,9 @@ class RpcConnection {
     private transport: ITransport;
     private id: number;
 
-    constructor(url: string, queryString: string) {
+    constructor(url: string, queryString?: string) {
         this.url = url;
-        this.queryString = queryString;
+        this.queryString = queryString || "";
         this.callbacks = new Map<string, (any) => void>();
         this.methods = new Map<string, (...args:any[]) => void>();
         this.id = 0;
@@ -53,6 +53,7 @@ class RpcConnection {
             new HttpClient().get(this.url + "/getid?" + this.queryString)
             .then(id => {
                 this.transport = new WebSocketTransport(data => this.messageReceived(data));
+                //this.transport = new LongPollingTransport(data => this.messageReceived(data));
                 return this.transport.connect(this.url, `id=${id}`);
             })
             .then(() => {