diff --git a/src/lib.rs b/src/lib.rs
index 9a39c93..5c0e25b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,6 +30,7 @@
 #![cfg_attr(nightly, feature(test))] 
 #![cfg_attr(nightly, feature(drain_filter))] 
 #![cfg_attr(nightly, feature(const_fn))] 
+#![cfg_attr(nightly, feature(never_type))] 
 
 #[cfg(nightly)] extern crate test;
 #[macro_use] extern crate const_fn;
diff --git a/src/primitive.rs b/src/primitive.rs
index 834a5a9..acb1e44 100644
--- a/src/primitive.rs
+++ b/src/primitive.rs
@@ -133,3 +133,11 @@ prim!(NonZeroUsize: ^+);
 prim!((): fn {
     0
 });
+
+#[cfg(nightly)] 
+prim!(!: {
+    fn collapse(&self) -> u8
+    {
+	*self
+    }
+});