Index: uspace/lib/c/generic/async/server.c
===================================================================
--- uspace/lib/c/generic/async/server.c	(revision 5a2e0dd5a99729f2bbcfc65e095f77e1698ebf8d)
+++ uspace/lib/c/generic/async/server.c	(revision de9a18e087fc024984f3c2000f77bc68fb593b76)
@@ -871,4 +871,6 @@
 
 		memset(call, 0, sizeof(ipc_call_t));
+		IPC_SET_IMETHOD(*call, IPC_M_PHONE_HUNGUP);
+		call->cap_handle = CAP_NIL;
 	}