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 c9c1ccd6e4a5eac6e9e07d4f080cc513bd3e46ba)
@@ -871,4 +871,6 @@
 
 		memset(call, 0, sizeof(ipc_call_t));
+		IPC_SET_IMETHOD(*call, IPC_M_PHONE_HUNGUP);
+		call->cap_handle = CAP_NIL;
 	}