diff --git a/src/libcore/unsafe.rs b/src/libcore/unsafe.rs
index 0803c91c038..77998438b27 100644
--- a/src/libcore/unsafe.rs
+++ b/src/libcore/unsafe.rs
@@ -6,7 +6,7 @@ export transmute_mut, transmute_immut, transmute_region, transmute_mut_region;
 export SharedMutableState, shared_mutable_state, clone_shared_mutable_state;
 export get_shared_mutable_state, get_shared_immutable_state;
 export unwrap_shared_mutable_state;
-export Exclusive, exclusive;
+export Exclusive, exclusive, unwrap_exclusive;
 
 import task::atomically;
 
diff --git a/src/libstd/arc.rs b/src/libstd/arc.rs
index 811c157498d..c45d5be4c0f 100644
--- a/src/libstd/arc.rs
+++ b/src/libstd/arc.rs
@@ -13,8 +13,9 @@ import sync;
 import sync::{mutex, mutex_with_condvars, rwlock, rwlock_with_condvars};
 
 export arc, clone, get;
-export condvar, mutex_arc, mutex_arc_with_condvars;
+export condvar, mutex_arc, mutex_arc_with_condvars, unwrap_mutex_arc;
 export rw_arc, rw_arc_with_condvars, rw_write_mode, rw_read_mode;
+export unwrap_rw_arc;
 
 /// As sync::condvar, a mechanism for unlock-and-descheduling and signalling.
 struct condvar { is_mutex: bool; failed: &mut bool; cond: &sync::condvar; }