diff --git a/libc/private/bionic_lock.h b/libc/private/bionic_lock.h
index a36d1ed..eb73274 100644
--- a/libc/private/bionic_lock.h
+++ b/libc/private/bionic_lock.h
@@ -57,7 +57,7 @@
     }
     while (atomic_exchange_explicit(&state, LockedWithWaiter, memory_order_acquire) != Unlocked) {
       // TODO: As the critical section is brief, it is a better choice to spin a few times befor sleeping.
-      __futex_wait_ex(&state, process_shared, LockedWithWaiter, NULL);
+      __futex_wait_ex(&state, process_shared, LockedWithWaiter, false, nullptr);
     }
     return;
   }