diff --git a/XmlSchemaClassGenerator/ModelBuilder.cs b/XmlSchemaClassGenerator/ModelBuilder.cs
index 44ddfb0d..44da26d1 100644
--- a/XmlSchemaClassGenerator/ModelBuilder.cs
+++ b/XmlSchemaClassGenerator/ModelBuilder.cs
@@ -387,6 +387,7 @@ private TypeModel CreateTypeModel(XmlSchemaSimpleType simpleType, NamespaceModel
                         Namespace = namespaceModel,
                         XmlSchemaName = qualifiedName,
                         XmlSchemaType = simpleType,
+                        IsAnonymous = string.IsNullOrEmpty(simpleType.QualifiedName.Name),
                     };
 
                     enumModel.Documentation.AddRange(docs);