diff --git a/packages/core/realtime-js/src/RealtimeClient.ts b/packages/core/realtime-js/src/RealtimeClient.ts
index a24671b15..48e001357 100755
--- a/packages/core/realtime-js/src/RealtimeClient.ts
+++ b/packages/core/realtime-js/src/RealtimeClient.ts
@@ -641,6 +641,10 @@ export default class RealtimeClient {
     this.conn.onerror = (error: Event) => this._onConnError(error)
     this.conn.onmessage = (event: any) => this._onConnMessage(event)
     this.conn.onclose = (event: any) => this._onConnClose(event)
+
+    if (this.conn.readyState === SOCKET_STATES.open) {
+      this._onConnOpen()
+    }
   }
 
   /**