Index: uspace/lib/c/generic/async/server.c
===================================================================
--- uspace/lib/c/generic/async/server.c	(revision ea4910bfed05043e6107a7bf8389ce3e6adfcf37)
+++ uspace/lib/c/generic/async/server.c	(revision 4f38ad778b01a722043e92db4cc6d662d2d7d7ec)
@@ -871,4 +871,6 @@
 
 		memset(call, 0, sizeof(ipc_call_t));
+		IPC_SET_IMETHOD(*call, IPC_M_PHONE_HUNGUP);
+		call->cap_handle = CAP_NIL;
 	}