diff --git a/Common/DemoSessionMessage.cs b/Common/DemoSessionMessage.cs
index 9fbb5e6..4adc69c 100644
--- a/Common/DemoSessionMessage.cs
+++ b/Common/DemoSessionMessage.cs
@@ -134,7 +134,7 @@ namespace Sample.Common
         }
         #region ShowStepPresent
         internal static void ShowStepPresent(
-            UserEnv userEnv, MachiningStep machiningStep)
+            UserService userEnv, MachiningStep machiningStep)
         {
             foreach (var entry in userEnv.DisplayedStepPresentAccessList)
             {