Index: uspace/lib/c/generic/async/server.c
===================================================================
--- uspace/lib/c/generic/async/server.c	(revision d83663074f80313df3a9070a823f80355dfebb7e)
+++ uspace/lib/c/generic/async/server.c	(revision 247fdeac73871cc6bd13ed2cc6665e081d3ea7cb)
@@ -871,4 +871,6 @@
 
 		memset(call, 0, sizeof(ipc_call_t));
+		IPC_SET_IMETHOD(*call, IPC_M_PHONE_HUNGUP);
+		call->cap_handle = CAP_NIL;
 	}