diff --git a/XmlSchemaClassGenerator.Tests/xsd/simple/ng.xsd b/XmlSchemaClassGenerator.Tests/xsd/simple/ng.xsd
new file mode 100644
index 00000000..e011e3f5
--- /dev/null
+++ b/XmlSchemaClassGenerator.Tests/xsd/simple/ng.xsd
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xs:schema xmlns="http://car/1.0"
+           attributeFormDefault="unqualified"
+           elementFormDefault="qualified"
+           targetNamespace="http://car/1.0"
+           xmlns:xs="http://www.w3.org/2001/XMLSchema">
+
+  <xs:group name="LimitedEditionType">
+    <xs:sequence>
+      <xs:element nillable="true" name="IsAvailable" type="xs:boolean" />
+    </xs:sequence>
+  </xs:group>
+
+  <xs:complexType name="PorscheType">
+    <xs:sequence>
+      <xs:group ref="LimitedEditionType"/>
+      <xs:element name="Model" type="xs:string" />
+    </xs:sequence>
+  </xs:complexType>
+
+</xs:schema>
diff --git a/XmlSchemaClassGenerator/TypeModel.cs b/XmlSchemaClassGenerator/TypeModel.cs
index cfbae63d..92a7fbf5 100644
--- a/XmlSchemaClassGenerator/TypeModel.cs
+++ b/XmlSchemaClassGenerator/TypeModel.cs
@@ -664,7 +664,7 @@ public void AddInterfaceMembersTo(CodeTypeDeclaration typeDeclaration)
             var isPrivateSetter = IsPrivateSetter;
             var typeReference = TypeReference;
 
-            if (isNullableValueType && Configuration.GenerateNullables)
+            if ((isNullableValueType || IsNillableValueType) && Configuration.GenerateNullables)
                 typeReference = NullableTypeRef(typeReference);
 
             member = new CodeMemberProperty