diff --git a/src/libcore/sys.rs b/src/libcore/sys.rs
index 99642c4a3ae1..99897fc7dd27 100644
--- a/src/libcore/sys.rs
+++ b/src/libcore/sys.rs
@@ -1,6 +1,7 @@
 //! Misc low level stuff
 
 export TypeDesc;
+export Closure;
 export get_type_desc;
 export size_of;
 export min_align_of;