diff --git a/sys/conf/newvers.sh b/sys/conf/newvers.sh
--- a/sys/conf/newvers.sh
+++ b/sys/conf/newvers.sh
@@ -51,6 +51,8 @@
 #		like the -V command
 #
 
+unset TYPE REVISION BRANCH RELEASE VERSION RELDATE
+
 TYPE="FreeBSD"
 REVISION="15.0"
 BRANCH="CURRENT"