diff --git a/websocket-sharp/Net/HttpListenerPrefixCollection.cs b/websocket-sharp/Net/HttpListenerPrefixCollection.cs
index b7960119..014ddb1d 100644
--- a/websocket-sharp/Net/HttpListenerPrefixCollection.cs
+++ b/websocket-sharp/Net/HttpListenerPrefixCollection.cs
@@ -133,8 +133,8 @@ namespace WebSocketSharp.Net
     /// <paramref name="uriPrefix"/> is invalid.
     /// </exception>
     /// <exception cref="ObjectDisposedException">
-    /// The <see cref="HttpListener"/> instance associated with this collection
-    /// is closed.
+    /// The <see cref="HttpListener"/> instance associated with this
+    /// collection is closed.
     /// </exception>
     public void Add (string uriPrefix)
     {