diff --git a/julia/ImmutableOrientedShape.jl b/julia/ImmutableOrientedShape.jl
index e69de29..62b6291 100644
--- a/julia/ImmutableOrientedShape.jl
+++ b/julia/ImmutableOrientedShape.jl
@@ -0,0 +1,9 @@
+include("Shape.jl")
+
+struct ImmutableOrientedShape
+    cubes::List{Tuple{Int8, Int8, Int8}}
+    hash::UInt
+end
+
+Base.hash(S::ImmutableOrientedShape) = S.hash
+Base.hash(S::ImmutableOrientedShape, h::UInt) = S.hash ⊻ h