Index: kern/vfs_syscalls.c
===================================================================
RCS file: /cvsroot/src/sys/kern/vfs_syscalls.c,v
retrieving revision 1.523
diff -u -r1.523 vfs_syscalls.c
--- kern/vfs_syscalls.c	5 Feb 2019 09:34:38 -0000	1.523
+++ kern/vfs_syscalls.c	5 Feb 2019 13:36:44 -0000
@@ -1636,9 +1636,12 @@
 
 	if (path == NULL) {
 		MODULE_CALL_HOOK(vfs_openat_10_hook, (&pb), enosys(), error);
-		if (error != 0 && error != ENOSYS)
+		if (error == ENOSYS)
+			goto no_compat;
+		if (error != 0)
 			return error;
 	} else {
+no_compat:
 		error = pathbuf_copyin(path, &pb);
 		if (error)
 			return error;