diff --git a/src/Surfaces/SurfaceType.h b/src/Surfaces/SurfaceType.h
index d46f6e9..3ee1301 100644
--- a/src/Surfaces/SurfaceType.h
+++ b/src/Surfaces/SurfaceType.h
@@ -5,7 +5,7 @@ namespace piMapper {
 
 struct SurfaceType {
 	enum {
-		TRIANGLE_SURFACE, QUAD_SURFACE
+		TRIANGLE_SURFACE, QUAD_SURFACE, GRID_WARP_SURFACE
 	};
 };