diff --git a/src/Graphics/SpriteBatch.cs b/src/Graphics/SpriteBatch.cs
index 5974d70..a824698 100644
--- a/src/Graphics/SpriteBatch.cs
+++ b/src/Graphics/SpriteBatch.cs
@@ -1182,7 +1182,7 @@ namespace Microsoft.Xna.Framework.Graphics
 		#region Private Sprite Data Container Class
 
 		[StructLayout(LayoutKind.Sequential, Pack = 1)]
-		public struct VertexPositionColorTexture4 : IVertexType
+		private struct VertexPositionColorTexture4 : IVertexType
 		{
 			public const int RealStride = 96;