diff --git a/script-user-add b/script-user-add
index d2c6c596..0c370942 100755
--- a/script-user-add
+++ b/script-user-add
@@ -28,7 +28,7 @@ ask_ok "Enable shared file access for user $username?" && \
     group_str+=",smbgrp" && \
     (echo "$password"; echo "$password") | smbpasswd -a -s "$username"
 
-useradd_cmd=("-G" "$group_str")
+useradd_cmd+=("-G" "$group_str")
 useradd_cmd+=("$username")
 echo "Command: ${useradd_cmd[*]}"
 "${useradd_cmd[@]}"