diff --git a/src/LevelSets/SignedDistances.jl b/src/LevelSets/SignedDistances.jl
index 85f6ec2f..863a1ec7 100644
--- a/src/LevelSets/SignedDistances.jl
+++ b/src/LevelSets/SignedDistances.jl
@@ -1,5 +1,7 @@
 using LinearAlgebra, GeometryBasics
 
+export sd_dem
+
 @inline S(x) = x == zero(x) ? oneunit(x) : sign(x)
 @inline sign_triangle(p, a, b, c) = S(dot(p - a, cross(b - a, c - a)))