diff --git a/websocket-sharp/Server/WebSocketSessionManager.cs b/websocket-sharp/Server/WebSocketSessionManager.cs
index 5944eead..9881cff0 100644
--- a/websocket-sharp/Server/WebSocketSessionManager.cs
+++ b/websocket-sharp/Server/WebSocketSessionManager.cs
@@ -1160,7 +1160,7 @@ namespace WebSocketSharp.Server
     ///   if not needed.
     ///   </para>
     ///   <para>
-    ///   That delegate invokes the method called when the send is complete.
+    ///   The delegate invokes the method called when the send is complete.
     ///   </para>
     ///   <para>
     ///   <c>true</c> is passed to the method if the send has done with