Index: uspace/drv/bus/isa/isa.c
===================================================================
--- uspace/drv/bus/isa/isa.c	(revision c1694b6b243b360b5f1fbf0629b5e7d4f7f4a515)
+++ uspace/drv/bus/isa/isa.c	(revision f77c1c90c1f223647872d5cefa2d86f63bc846d7)
@@ -281,6 +281,6 @@
 	struct stat st;
 
-	fd = vfs_lookup_open(conf_path, WALK_REGULAR, MODE_READ);
-	if (fd < 0) {
+	rc = vfs_lookup_open(conf_path, WALK_REGULAR, MODE_READ, &fd);
+	if (rc != EOK) {
 		ddf_msg(LVL_ERROR, "Unable to open %s", conf_path);
 		goto cleanup;