diff --git a/inc/hgl/graph/VK.h b/inc/hgl/graph/VK.h
index 78cf3b3e..fec3aac5 100644
--- a/inc/hgl/graph/VK.h
+++ b/inc/hgl/graph/VK.h
@@ -59,6 +59,18 @@ struct DeviceBufferData;
 class VertexAttribBuffer;
 using VBO=VertexAttribBuffer;
 
+struct VBOAccessData
+{
+    VBO *buf;
+    VkDeviceSize offset;
+
+public:
+
+    CompOperatorMemcmp(const VBOAccessData &);
+};//struct VBOAccessData
+
+using VBOAccessMap=Map<AnsiString,VBOAccessData>;
+
 class IndexBuffer;
 
 struct IndexBufferData
diff --git a/inc/hgl/graph/VKPrimitive.h b/inc/hgl/graph/VKPrimitive.h
index 9e6c1e50..be712357 100644
--- a/inc/hgl/graph/VKPrimitive.h
+++ b/inc/hgl/graph/VKPrimitive.h
@@ -15,17 +15,7 @@ class Primitive
     GPUDevice *device;
     AnsiString prim_name;
 
-    struct VBOData
-    {
-        VBO *buf;
-        VkDeviceSize offset;
-
-    public:
-
-        CompOperatorMemcmp(const VBOData &);
-    };
-
-    Map<AnsiString,VBOData> buffer_list;
+    VBOAccessMap buffer_list;
 
 protected:
 
diff --git a/src/SceneGraph/Vulkan/VKPrimitive.cpp b/src/SceneGraph/Vulkan/VKPrimitive.cpp
index 61a227ac..3910ef31 100644
--- a/src/SceneGraph/Vulkan/VKPrimitive.cpp
+++ b/src/SceneGraph/Vulkan/VKPrimitive.cpp
@@ -32,7 +32,7 @@ bool Primitive::Set(const AnsiString &name,VBO *vbo,VkDeviceSize offset)
     if(!vbo)return(false);
     if(buffer_list.KeyExist(name))return(false);
 
-    VBOData bd;
+    VBOAccessData bd;
     
     bd.buf=vbo;
     bd.offset=offset;
@@ -57,7 +57,7 @@ VBO *Primitive::GetVBO(const AnsiString &name,VkDeviceSize *offset)
     if(!offset)return(nullptr);
     if(name.IsEmpty())return(nullptr);
 
-    VBOData bd;
+    VBOAccessData bd;
 
     if(buffer_list.Get(name,bd))
     {