diff --git a/Samples/Server/Server_Simple_Samples.cs b/Samples/Server/Server_Simple_Samples.cs
index 0ea4b6b7..167aab64 100644
--- a/Samples/Server/Server_Simple_Samples.cs
+++ b/Samples/Server/Server_Simple_Samples.cs
@@ -138,7 +138,7 @@ public static class Server_Simple_Samples
                     e.ReasonCode = MqttConnectReasonCode.ClientIdentifierNotValid;
                 }
 
-                if (e.UserName != "ValidUser")
+                if (e.Username != "ValidUser")
                 {
                     e.ReasonCode = MqttConnectReasonCode.BadUserNameOrPassword;
                 }
@@ -216,4 +216,4 @@ public static class Server_Simple_Samples
             }
         }
     }
-}
\ No newline at end of file
+}