diff --git a/gfx/prop/orientation.lua b/gfx/prop/orientation.lua
index 5d9ffec..8cb4541 100644
--- a/gfx/prop/orientation.lua
+++ b/gfx/prop/orientation.lua
@@ -22,4 +22,7 @@ function Orientation:with(elementType)
   return elementType
 end
 
+Orientation.VERTICAL = true
+Orientation.HORIZONTAL = false
+
 return Orientation
\ No newline at end of file