diff --git a/XmlSchemaClassGenerator.Tests/XmlTests.cs b/XmlSchemaClassGenerator.Tests/XmlTests.cs
index ba89f441..8364e0b1 100644
--- a/XmlSchemaClassGenerator.Tests/XmlTests.cs
+++ b/XmlSchemaClassGenerator.Tests/XmlTests.cs
@@ -165,9 +165,12 @@ public void TestGuid()
             var testType = assembly.GetType("Guid.Test");
             var idProperty = testType.GetProperty("Id");
             var elementIdProperty = testType.GetProperty("ElementId");
+            var headerType = assembly.GetType("Guid.V1.Header");
+            var referenceProperty = headerType.GetProperty("Reference");
 
             Assert.Equal(typeof(Nullable<>).MakeGenericType(typeof(Guid)), idProperty.PropertyType);
             Assert.Equal(typeof(Guid), elementIdProperty.PropertyType);
+            Assert.Equal(typeof(Guid), referenceProperty.PropertyType);
 
             var serializer = new XmlSerializer(testType);
 
diff --git a/XmlSchemaClassGenerator.Tests/xsd/guid/header.xsd b/XmlSchemaClassGenerator.Tests/xsd/guid/header.xsd
new file mode 100644
index 00000000..877c180c
--- /dev/null
+++ b/XmlSchemaClassGenerator.Tests/xsd/guid/header.xsd
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           id="BerichtHeaderSHV"
+           targetNamespace="http://tempuri.org/v1"
+           elementFormDefault="qualified"
+           xmlns="http://tempuri.org/v1"
+           version="1.0">
+
+	<xs:include schemaLocation="uuid.xsd"/>
+
+	<xs:complexType name="Header">
+		<xs:sequence>
+			<xs:element name="Reference" type="UUID"/>
+			<xs:element name="Receiver" type="UUID" minOccurs="0" nillable="true"/>
+			<xs:element name="CrossReference" type="UUID" minOccurs="0" nillable="true"/>
+			<xs:element name="ConversationReference" type="UUID" minOccurs="0" nillable="true"/>
+			<xs:element name="Version" type="xs:string"/>
+		</xs:sequence>
+	</xs:complexType>
+
+	<xs:element name="Header" type="Header"/>
+</xs:schema>
\ No newline at end of file
diff --git a/XmlSchemaClassGenerator.Tests/xsd/guid/uuid.xsd b/XmlSchemaClassGenerator.Tests/xsd/guid/uuid.xsd
new file mode 100644
index 00000000..9bb156ad
--- /dev/null
+++ b/XmlSchemaClassGenerator.Tests/xsd/guid/uuid.xsd
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xs:schema xmlns:mxs="http://microsoft.com/wsdl/types/"
+           xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           id="UUID"
+           targetNamespace="http://tempuri.org/v1"
+           xmlns:t="http://tempuri.org/v1"
+           elementFormDefault="qualified"
+           version="1.0">
+
+	<xs:import schemaLocation="guid.xsd" namespace="http://microsoft.com/wsdl/types/"/>
+	<xs:simpleType name="IntermediateUUID">
+		<xs:restriction base="mxs:guid"/>
+	</xs:simpleType>
+	<xs:simpleType name="UUID">
+		<xs:restriction base="t:IntermediateUUID" />
+	</xs:simpleType>
+</xs:schema>
\ No newline at end of file
diff --git a/XmlSchemaClassGenerator/CodeUtilities.cs b/XmlSchemaClassGenerator/CodeUtilities.cs
index 949131c8..88b85b7b 100644
--- a/XmlSchemaClassGenerator/CodeUtilities.cs
+++ b/XmlSchemaClassGenerator/CodeUtilities.cs
@@ -114,7 +114,7 @@ public static Type GetEffectiveType(this XmlSchemaDatatype type, GeneratorConfig
                 _ => type.ValueType,
             };
 
-            if (schemaType.QualifiedName == GuidQualifiedName)
+            if (schemaType.IsDerivedFrom(GuidQualifiedName))
             {
                 resultType = typeof(Guid);
             }
diff --git a/XmlSchemaClassGenerator/Extensions.cs b/XmlSchemaClassGenerator/Extensions.cs
index 056d5476..b693f315 100644
--- a/XmlSchemaClassGenerator/Extensions.cs
+++ b/XmlSchemaClassGenerator/Extensions.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Xml;
 using System.Xml.Schema;
 
 namespace XmlSchemaClassGenerator
@@ -28,5 +29,16 @@ public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TS
         }
 
         public static string QuoteIfNeeded(this string text) => !string.IsNullOrEmpty(text) && text.Contains(" ") ? "\"" + text + "\"" : text;
+
+        public static bool IsDerivedFrom(this XmlSchemaType type, XmlQualifiedName qualifiedName)
+        {
+            while (type != null)
+            {
+                if (type.QualifiedName == qualifiedName) return true;
+                type = type.BaseXmlSchemaType;
+            }
+
+            return false;
+        }
     }
 }