diff --git a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
index f3d088c5..08125e92 100644
--- a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
+++ b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
@@ -6,8 +6,8 @@ using System.Net.NetworkInformation;
 using System.Threading;
 using Shadowsocks.Model;
 using System.Reflection;
-using Shadowsocks.Util;
-
+using Shadowsocks.Util;
+
 namespace Shadowsocks.Controller
 {
     class AvailabilityStatistics
@@ -81,6 +81,7 @@ namespace Shadowsocks.Controller
                     }
                     catch (Exception e)
                     {
+                        Console.WriteLine($"An exception occured when eveluating {server.FriendlyName()}");
                         Logging.LogUsefulException(e);
                     }
                 }