Index: uspace/lib/drv/generic/driver.c
===================================================================
--- uspace/lib/drv/generic/driver.c	(revision 889cdb1c2046af9d31d314fa691773fa2e4f9119)
+++ uspace/lib/drv/generic/driver.c	(revision faf19d46527b6580aa9e3488fa09a9ff27b64328)
@@ -339,5 +339,5 @@
 {
 	/* Accept connection */
-	async_answer_0(icall, EOK);
+	async_answer_5(icall, EOK, 0, 0, 0, 0, async_get_label());
 
 	while (true) {
@@ -419,5 +419,5 @@
 		ret = (*fun->ops->open)(fun);
 
-	async_answer_0(icall, ret);
+	async_answer_5(icall, ret, 0, 0, 0, 0, async_get_label());
 	if (ret != EOK) {
 		fun_del_ref(fun);