diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index bf3500e4c724..56405224c8a9 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -189,6 +189,8 @@ rust_take_global_args_lock
 rust_drop_global_args_lock
 rust_take_change_dir_lock
 rust_drop_change_dir_lock
+rust_take_linenoise_lock
+rust_drop_linenoise_lock
 rust_get_test_int
 rust_get_task
 rust_uv_get_loop_from_getaddrinfo_req