diff --git a/lib/libthr/thread/thr_cond.c b/lib/libthr/thread/thr_cond.c
--- a/lib/libthr/thread/thr_cond.c
+++ b/lib/libthr/thread/thr_cond.c
@@ -63,6 +63,7 @@
 __weak_reference(__thr_cond_wait, __pthread_cond_wait);
 __weak_reference(_thr_cond_wait, _pthread_cond_wait);
 __weak_reference(__pthread_cond_timedwait, pthread_cond_timedwait);
+__weak_reference(_thr_cond_timedwait, _pthread_cond_timedwait);
 __weak_reference(_thr_cond_init, pthread_cond_init);
 __weak_reference(_thr_cond_init, _pthread_cond_init);
 __weak_reference(_thr_cond_destroy, pthread_cond_destroy);