diff --git a/src/realtime/connection.js b/src/realtime/connection.js
index 38fb031..ce3a303 100644
--- a/src/realtime/connection.js
+++ b/src/realtime/connection.js
@@ -100,7 +100,7 @@ class RealtimeConnection extends Events {
      * @param {string} data - The message data
      */
     send(data) {
-        if (this._socket && this._socket.readyState === 1) {
+        if (this._socket && this._socket.readyState === WebSocket.OPEN) {
             this._socket.send(data);
         }
     }