diff --git a/Assets/UnityWebSocket/Plugins/WebGL/WebSocket.jslib b/Assets/UnityWebSocket/Plugins/WebGL/WebSocket.jslib
index a5ba581e..b5a3bd2e 100644
--- a/Assets/UnityWebSocket/Plugins/WebGL/WebSocket.jslib
+++ b/Assets/UnityWebSocket/Plugins/WebGL/WebSocket.jslib
@@ -295,7 +295,7 @@ var WebSocketLibrary =
         if (instance.ws === null) return -3;
         if (instance.ws.readyState !== 1) return -6;
 
-        instance.ws.send(buffer.slice(bufferPtr, bufferPtr + length));
+        instance.ws.send(buffer.slice(bufferPtr, bufferPtr + length).buffer);
 
         return 0;
     },