diff --git a/src/pthread.c b/src/pthread.c
index 4c9c4a1..db3dda2 100644
--- a/src/pthread.c
+++ b/src/pthread.c
@@ -2127,6 +2127,13 @@ sched_yield(void)
 	return 0;
 }
 
+// Legacy name of sched_yield() that libSystem has always exported
+void
+pthread_yield_np(void)
+{
+	sched_yield();
+}
+
 // Libsystem knows about this symbol and exports it to libsyscall
 int
 pthread_current_stack_contains_np(const void *addr, size_t length)