diff --git a/include/websock.js b/include/websock.js
index f3336a0a..4d7a4f9a 100644
--- a/include/websock.js
+++ b/include/websock.js
@@ -197,7 +197,7 @@ function Websock() {
             }
 
             if (this._websocket.bufferedAmount < this.maxBufferedAmount) {
-                if (this._sQlen > 0) {
+                if (this._sQlen > 0 && this._websocket.readyState === WebSocket.OPEN) {
                     this._websocket.send(this._encode_message());
                     this._sQlen = 0;
                 }