Index: uspace/lib/c/include/async.h
===================================================================
--- uspace/lib/c/include/async.h	(revision 46eec3b53871d0ac0060777d9d112b18a269c0d3)
+++ uspace/lib/c/include/async.h	(revision 6f8f80824863744e32e74048bb1a7f3b4e519c21)
@@ -104,4 +104,6 @@
 extern void async_set_client_data_constructor(async_client_data_ctor_t);
 extern void async_set_client_data_destructor(async_client_data_dtor_t);
+
+extern void *async_client_data_get(void);
 
 extern void async_set_client_connection(async_client_conn_t);