diff --git a/install.sh b/install.sh
index a36e18d..cb7db9e 100755
--- a/install.sh
+++ b/install.sh
@@ -7,8 +7,8 @@ if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
     exit 1
 fi
 
-OPTIONS=dtlhus
-LONGOPTS=device,timezone,locale,hostname,username,sudogrp,help
+OPTIONS=d:t:l:h:u:s:
+LONGOPTS=device:,timezone:,locale:,hostname:,username:,sudogrp:,help
 
 ! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
 if [[ ${PIPESTATUS[0]} -ne 0 ]]; then