diff --git a/inc/hgl/type/Gradient.h b/inc/hgl/type/Gradient.h
index 4952252..d73e402 100644
--- a/inc/hgl/type/Gradient.h
+++ b/inc/hgl/type/Gradient.h
@@ -32,7 +32,7 @@ namespace hgl
 
             Comparator<GS> comp;
 
-            hgl::Sort(stop_list,&comp);
+            hgl::Sort(stop_list.GetArray(),&comp);
 
             dirty=false;
         }
diff --git a/inc/hgl/type/List.h b/inc/hgl/type/List.h
index 5852f37..9ccddcc 100644
--- a/inc/hgl/type/List.h
+++ b/inc/hgl/type/List.h
@@ -32,6 +32,9 @@ namespace hgl
 
     public:
 
+            DataArray<T> &      GetArray()          {return data_array;}
+            const DataArray<T> &GetArray()const     {return data_array;}
+
             operator        DataArray<T> & ()       {return data_array;}
             operator const  DataArray<T> & ()const  {return data_array;}