diff --git a/tools/nbsd.config b/tools/nbsd.config
index ea1c240f8..af71c7b3d 100644
--- a/tools/nbsd.config
+++ b/tools/nbsd.config
@@ -1,3 +1,3 @@
 NBSD_CVSROOT= anoncvs@anoncvs.netbsd.org:/cvsroot
 
-NBSD_REF= "-D 2011-01-22"	# The date (or tag) of ported NetBSD sources.
+NBSD_REF= "-D 2011-01-22 UTC0"	# The date (or tag) of ported NetBSD sources.