diff --git a/websocket-sharp/Server/WebSocketBehavior.cs b/websocket-sharp/Server/WebSocketBehavior.cs
index 7154c4e3..3979a54b 100644
--- a/websocket-sharp/Server/WebSocketBehavior.cs
+++ b/websocket-sharp/Server/WebSocketBehavior.cs
@@ -433,7 +433,7 @@ namespace WebSocketSharp.Server
     }
 
     /// <summary>
-    /// Called when the WebSocket instance used in a session receives a message.
+    /// Called when the WebSocket instance for a session receives a message.
     /// </summary>
     /// <param name="e">
     /// A <see cref="MessageEventArgs"/> that represents the event data passed