Index: uspace/lib/c/generic/async.c
===================================================================
--- uspace/lib/c/generic/async.c	(revision 79a141a1d398510dededba42ea38c1e569fd6933)
+++ uspace/lib/c/generic/async.c	(revision 9be360ee65739363f6f9a07bfff0dac29a8b2888)
@@ -1808,4 +1808,6 @@
 	async_sess_t *sess = exch->sess;
 	
+	atomic_dec(&sess->refcnt);
+	
 	if (sess->mgmt == EXCHANGE_SERIALIZE)
 		fibril_mutex_unlock(&sess->mutex);