Index: uspace/lib/c/include/rwlock.h
===================================================================
--- uspace/lib/c/include/rwlock.h	(revision df7cbc6158b5559373b8260b54360527652e78d2)
+++ uspace/lib/c/include/rwlock.h	(revision 87179ca4cc0cc8cd9da9a24f0dbac1e8e927d8e1)
@@ -49,8 +49,8 @@
 
 #define rwlock_initialize(rwlock)	futex_initialize((rwlock), 1)
-#define rwlock_read_lock(rwlock)	futex_down((rwlock))
-#define rwlock_write_lock(rwlock)	futex_down((rwlock))
-#define rwlock_read_unlock(rwlock)	futex_up((rwlock))
-#define rwlock_write_unlock(rwlock)	futex_up((rwlock))
+#define rwlock_read_lock(rwlock)	futex_lock((rwlock))
+#define rwlock_write_lock(rwlock)	futex_lock((rwlock))
+#define rwlock_read_unlock(rwlock)	futex_unlock((rwlock))
+#define rwlock_write_unlock(rwlock)	futex_unlock((rwlock))
 
 #endif