diff --git a/stand/kboot/kboot/hostfs.c b/stand/kboot/kboot/hostfs.c
--- a/stand/kboot/kboot/hostfs.c
+++ b/stand/kboot/kboot/hostfs.c
@@ -137,7 +137,7 @@
 	offl = res & 0xfffffffful;
 	offh = (res >> 32) & 0xfffffffful;
 	err = host_llseek(hf->hf_fd, offh, offl, &res, whence);
-	if (err < 0)
+	if (err < 0 && err >= -511)	/* Raw syscalll interface */
 		return (err);
 	return (res);
 }