diff --git a/usr.sbin/adduser/adduser.8 b/usr.sbin/adduser/adduser.8
index ab5b364d69c7..2df836ac5c19 100644
--- a/usr.sbin/adduser/adduser.8
+++ b/usr.sbin/adduser/adduser.8
@@ -212,7 +212,7 @@ This option makes
 .Ar login_group
 the default.
 .It Fl G Ar groups
-Additional groups.
+Space-separated list of additional groups.
 This option allows the user to specify additional groups to add users to.
 The user is a member of these groups in addition to their login group.
 .It Fl h
diff --git a/usr.sbin/adduser/adduser.sh b/usr.sbin/adduser/adduser.sh
index b7b97e099e4d..53c42de030a1 100644
--- a/usr.sbin/adduser/adduser.sh
+++ b/usr.sbin/adduser/adduser.sh
@@ -603,6 +603,7 @@ input_from_file() {
 			get_homedir
 			get_password
 			get_expire_dates
+			ugroups="$defaultgroups"
 
 			add_user
 			;;