diff --git a/MarketDataServer/Controllers/PingController.cs b/MarketDataServer/Controllers/PingController.cs
index ea12918..4129dfc 100755
--- a/MarketDataServer/Controllers/PingController.cs
+++ b/MarketDataServer/Controllers/PingController.cs
@@ -20,7 +20,7 @@ namespace MarketDataServer.Controllers
     public String GetSystemInfo()
     {
       MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[{0:G}][PingController::GetSystemInfo]", DateTime.Now));
-      return Environment.VersionString.;
+      return Environment.OSVersion.VersionString;
     }    
   }
 }