diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 3ca05b94711e..1c3f6370deda 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -233,3 +233,5 @@ rust_boxed_region_malloc
 rust_boxed_region_free
 rust_try
 rust_begin_unwind
+rust_take_task_borrow_list
+rust_set_task_borrow_list