Index: uspace/lib/c/generic/async/server.c
===================================================================
--- uspace/lib/c/generic/async/server.c	(revision 25f6bddb8298e93b8b3c063cd5d4808e555c9d54)
+++ uspace/lib/c/generic/async/server.c	(revision 737ebf303532be0cc0b22233d0ef1a31b9701e5c)
@@ -871,4 +871,6 @@
 
 		memset(call, 0, sizeof(ipc_call_t));
+		IPC_SET_IMETHOD(*call, IPC_M_PHONE_HUNGUP);
+		call->cap_handle = CAP_NIL;
 	}