thodg/got

diff --git a/util/got-build-regress.sh b/util/got-build-regress.sh
index c0b3c80..18b329e 100755
--- a/util/got-build-regress.sh
+++ b/util/got-build-regress.sh
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 prog=`basename $0`
-usage="$prog [-b branch] [-f] [-w worktree ] [ -r from-address ] email-address [email-address ...]"
+usage="$prog [-b branch] [-f] [-w worktree ] [ -r from-address ] [-R testroot] email-address [email-address ...]"
 branch=main
 worktree=$HOME/got
 fromaddr_arg=