diff --git a/userspace/libraries/LibC/include/pthread.h b/userspace/libraries/LibC/include/pthread.h
index 30f911a0..2f4600a8 100644
--- a/userspace/libraries/LibC/include/pthread.h
+++ b/userspace/libraries/LibC/include/pthread.h
@@ -57,8 +57,8 @@ struct uthread
 
 #define PTHREAD_SPIN_INITIALIZER   (pthread_spinlock_t)0
 #define PTHREAD_COND_INITIALIZER   (pthread_cond_t){ { CLOCK_REALTIME, 0 }, PTHREAD_SPIN_INITIALIZER, NULL }
-#define PTHREAD_MUTEX_INITIALIZER  (pthread_mutex_t){ { PTHREAD_MUTEX_DEFAULT, false }, 0, 0 }
-#define PTHREAD_RWLOCK_INITIALIZER (pthread_rwlock_t){ { false }, 0, 0 }
+#define PTHREAD_MUTEX_INITIALIZER  (pthread_mutex_t){ { PTHREAD_MUTEX_DEFAULT, 0 }, 0, 0 }
+#define PTHREAD_RWLOCK_INITIALIZER (pthread_rwlock_t){ { 0 }, 0, 0 }
 
 int			pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));
 int			pthread_attr_destroy(pthread_attr_t* attr);