diff --git a/sys/fs/tarfs/tarfs_subr.c b/sys/fs/tarfs/tarfs_subr.c
index 6aa7eaedb773..a0077c611f25 100644
--- a/sys/fs/tarfs/tarfs_subr.c
+++ b/sys/fs/tarfs/tarfs_subr.c
@@ -79,13 +79,13 @@ tarfs_sysctl_handle_ioshift(SYSCTL_HANDLER_ARGS)
 }
 
 SYSCTL_PROC(_vfs_tarfs, OID_AUTO, ioshift,
-    CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW | CTLFLAG_TUN,
+    CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RWTUN,
     &tarfs_ioshift, 0, tarfs_sysctl_handle_ioshift, "IU",
     "Tar filesystem preferred I/O size (log 2)");
 
 #ifdef TARFS_DEBUG
 int tarfs_debug;
-SYSCTL_INT(_vfs_tarfs, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN,
+SYSCTL_INT(_vfs_tarfs, OID_AUTO, debug, CTLFLAG_RWTUN,
     &tarfs_debug, 0, "Tar filesystem debug mask");
 #endif	/* TARFS_DEBUG */