diff --git a/websocket-sharp/Server/HttpServer.cs b/websocket-sharp/Server/HttpServer.cs
index 7f58af25..1ec5c3be 100644
--- a/websocket-sharp/Server/HttpServer.cs
+++ b/websocket-sharp/Server/HttpServer.cs
@@ -1029,7 +1029,7 @@ namespace WebSocketSharp.Server
         _listener.Start ();
       }
       catch (Exception ex) {
-        var msg = "The underlying HttpListener has failed to start.";
+        var msg = "The underlying listener has failed to start.";
         throw new InvalidOperationException (msg, ex);
       }