diff --git a/Stack/Opc.Ua.Core/Types/Encoders/BinaryEncoder.cs b/Stack/Opc.Ua.Core/Types/Encoders/BinaryEncoder.cs
index 309dc8fb4e..826a57f2a5 100644
--- a/Stack/Opc.Ua.Core/Types/Encoders/BinaryEncoder.cs
+++ b/Stack/Opc.Ua.Core/Types/Encoders/BinaryEncoder.cs
@@ -1812,7 +1812,7 @@ namespace Opc.Ua
                     case BuiltInType.LocalizedText: { WriteLocalizedText(null, (LocalizedText)valueToEncode); return; }
                     case BuiltInType.ExtensionObject: { WriteExtensionObject(null, (ExtensionObject)valueToEncode); return; }
                     case BuiltInType.DataValue: { WriteDataValue(null, (DataValue)valueToEncode); return; }
-                    case BuiltInType.Enumeration: { WriteInt32(null, (int)valueToEncode); return; }
+                    case BuiltInType.Enumeration: { WriteInt32(null, Convert.ToInt32(valueToEncode)); return; }
                 }
 
                 throw ServiceResultException.Create(