diff --git a/src/lib.rs b/src/lib.rs
index 4d8f44b..e4a591d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -156,6 +156,7 @@ impl Typed for MacAddress {
 }
 
 impl<A: Typed, B: Typed> !Typed for (A, B) {}
+impl !Typed for () {}
 
 impl<T: Typed> Typed for Option<T> {
     fn type_name() -> String {