Index: uspace/lib/c/generic/async.c
===================================================================
--- uspace/lib/c/generic/async.c	(revision e6211f839bdbf45238fd7eeaf0ba0e042c0021b8)
+++ uspace/lib/c/generic/async.c	(revision 60e5a8569c8ec6ff69c5bdc746d53f4ae2c3a4f4)
@@ -1808,4 +1808,6 @@
 	async_sess_t *sess = exch->sess;
 	
+	atomic_dec(&sess->refcnt);
+	
 	if (sess->mgmt == EXCHANGE_SERIALIZE)
 		fibril_mutex_unlock(&sess->mutex);