diff --git a/src/num/ext.rs b/src/num/ext.rs
index a230428..00192c2 100644
--- a/src/num/ext.rs
+++ b/src/num/ext.rs
@@ -18,6 +18,11 @@ use num::default_eq::*;
 pub trait TypeExt: TypeConsts, DefaultEq {}
 
 
+pub trait BooleanExt: TypeExt {}
+
+pub impl bool: BooleanExt {}
+
+
 pub trait NumExt: Copy, TypeExt, Eq, Num, NumCast, Ord {}