Index: uspace/lib/libc/include/rwlock.h
===================================================================
--- uspace/lib/libc/include/rwlock.h	(revision 9413c0d0defe05c5ae4a86bbc19f4184d15f5da3)
+++ uspace/lib/libc/include/rwlock.h	(revision b3c38750a1d4b8fe19c67acaa51288310cd9ba5d)
@@ -45,4 +45,7 @@
 typedef atomic_t rwlock_t;
 
+#define RWLOCK_INITIALIZE(rwlock)	\
+    rwlock_t rwlock = FUTEX_INITIALIZER
+
 #define rwlock_initialize(rwlock)	futex_initialize((rwlock), 1)
 #define rwlock_reader_lock(rwlock)	futex_down((rwlock))