Index: uspace/lib/c/generic/async.c
===================================================================
--- uspace/lib/c/generic/async.c	(revision e6211f839bdbf45238fd7eeaf0ba0e042c0021b8)
+++ uspace/lib/c/generic/async.c	(revision f2f99aed0bc86b7a8fe3b5bb4754d25c62169247)
@@ -1808,4 +1808,6 @@
 	async_sess_t *sess = exch->sess;
 	
+	atomic_dec(&sess->refcnt);
+	
 	if (sess->mgmt == EXCHANGE_SERIALIZE)
 		fibril_mutex_unlock(&sess->mutex);