diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index ed511589..3fa8eb37 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -618,7 +618,14 @@ namespace WebSocketSharp.Server
     ///   -or-
     ///   </para>
     ///   <para>
-    ///   <paramref name="path"/> is invalid.
+    ///   <paramref name="path"/> is not an absolute path.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> includes either or both
+    ///   query and fragment components.
     ///   </para>
     /// </exception>
     public bool RemoveService (string path)