Index: uspace/srv/vfs/vfs_ops.c
===================================================================
--- uspace/srv/vfs/vfs_ops.c	(revision c8a894d80f241d58349cd8422ede2f690d234533)
+++ uspace/srv/vfs/vfs_ops.c	(revision 7e8403bf6e473b5bad676967b6fe26eb1e3994f9)
@@ -1355,5 +1355,5 @@
 	if (IPC_GET_IMETHOD(data) != VFS_IN_PING) {
 		rc = ENOTSUP;
-		async_answer_1(callid, rc, 0);
+		async_answer_0(callid, rc);
 		goto exit;
 	}
@@ -1388,5 +1388,5 @@
 		if (IPC_GET_IMETHOD(data) != VFS_IN_PING) {
 			rc = ENOTSUP;
-			async_answer_3(callid, rc, 0, 0, 0);
+			async_answer_0(callid, rc);
 			goto exit;
 		}