diff --git a/three/_scanner.py b/three/_scanner.py
index 8e2ef3f..97be7ce 100644
--- a/three/_scanner.py
+++ b/three/_scanner.py
@@ -202,7 +202,7 @@ def __OnMessage(self, ws, message) -> None:
                 else:
                     self.__buffer = message
                 if self.__bufferDescriptor.Size == len(self.__buffer):
-                    self.OnBuffer(self.__bufferDescriptor, message)
+                    self.OnBuffer(self.__bufferDescriptor, self.__buffer)
                     self.__bufferDescriptor = None 
                     self.__buffer = None
         else: