diff --git a/dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/WebSocketHubConnectionP2.java b/dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/WebSocketHubConnectionP2.java
index 9389a08..264d59d 100644
--- a/dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/WebSocketHubConnectionP2.java
+++ b/dotnetcoresignalrclientjava/src/main/java/com/smartarmenia/dotnetcoresignalrclientjava/WebSocketHubConnectionP2.java
@@ -199,6 +199,9 @@ public void run() {
 
     @Override
     public synchronized boolean isConnected() {
+        if (client == null)
+            return false;
+
         return client.isOpen();
     }