Index: uspace/lib/c/include/async.h
===================================================================
--- uspace/lib/c/include/async.h	(revision 059a8e4b4f97d287fdb888636dac0f59bfafa019)
+++ uspace/lib/c/include/async.h	(revision 47c9a8c8f9297a115c8e45925ea8c045857037bb)
@@ -139,4 +139,5 @@
 extern void async_wait_for(aid_t, sysarg_t *);
 extern int async_wait_timeout(aid_t, sysarg_t *, suseconds_t);
+extern void async_forget(aid_t);
 
 extern fid_t async_new_connection(task_id_t, sysarg_t, ipc_callid_t,