diff --git a/src/cgmath.rs b/src/cgmath.rs
index e006098..ae72713 100644
--- a/src/cgmath.rs
+++ b/src/cgmath.rs
@@ -77,7 +77,7 @@ pub use obb::{Obb2, Obb3};
 pub use sphere::Sphere;
 
 pub use approx::ApproxEq;
-pub use num::{BaseNum, BaseInt, BaseFloat, One, one, Zero, zero};
+pub use num::{PartialOrd, BaseNum, BaseInt, BaseFloat, One, one, Zero, zero};
 
 // Modules