diff --git a/lib/fuckwebsockets.php b/lib/fuckwebsockets.php
index 66f47e5..cb5b306 100644
--- a/lib/fuckwebsockets.php
+++ b/lib/fuckwebsockets.php
@@ -393,7 +393,8 @@ class fuckwebsockets{
 						if($masked){
 							
 							// get mask and message payload
-							$this->socket_recv($this->client, $frame_data, $messagelength + 4, MSG_WAITALL);
+							$messagelength += 4;
+							$this->socket_recv($this->client, $frame_data, $messagelength, MSG_WAITALL);
 							
 							for($i=4; $i<$messagelength; $i++){