diff --git a/include/rapidjson/schema.h b/include/rapidjson/schema.h
index b3939c2..883706c 100644
--- a/include/rapidjson/schema.h
+++ b/include/rapidjson/schema.h
@@ -152,7 +152,7 @@ public:
     typedef typename EncodingType::Ch Ch;
     typedef SchemaValidationContext<SchemaDocumentType> Context;
     typedef Schema<SchemaDocumentType> SchemaType;
-    friend SchemaDocumentType;
+    friend class GenericSchemaDocument<ValueType, AllocatorType>;
 
     Schema(SchemaDocumentType* document, const PointerType& p, const ValueType& value) :
         not_(),