diff --git a/libc/bionic/pthread_once.cpp b/libc/bionic/pthread_once.cpp
index 7688a23..f48eadc 100644
--- a/libc/bionic/pthread_once.cpp
+++ b/libc/bionic/pthread_once.cpp
@@ -79,7 +79,7 @@
     }
 
     // The initialization is underway, wait for its finish.
-    __futex_wait_ex(once_control_ptr, 0, old_value, NULL);
+    __futex_wait_ex(once_control_ptr, 0, old_value, false, nullptr);
     old_value = atomic_load_explicit(once_control_ptr, memory_order_acquire);
   }
 }