diff --git a/wrap/io_trimesh/export_u3d.h b/wrap/io_trimesh/export_u3d.h
index 7612ac6e..e189ef52 100644
--- a/wrap/io_trimesh/export_u3d.h
+++ b/wrap/io_trimesh/export_u3d.h
@@ -228,6 +228,7 @@ public:
 
 		//vert
 		//capability |= Mask::IOM_VERTNORMAL;
+		capability |= vcg::tri::io::Mask::IOM_VERTCOLOR;
 		//capability |= vcg::tri::io::Mask::IOM_VERTCOLOR;
 
 		////wedg