diff --git a/dislocker.py b/dislocker.py
index c321cd3..71b330d 100644
--- a/dislocker.py
+++ b/dislocker.py
@@ -953,7 +953,7 @@ class Bot(discord.Client):
                 mouse_number_show = "自前"
             else:
                 mouse_number_show = mouse_number
-            if custom_id_split[4]:
+            if len(custom_id_split) == 5:
                 if custom_id_split[4] == "quick":
                     reason = custom_id_split[5]
                     register = bot.register(discord_user_id=interaction.user.id, name=interaction.user.name, display_name=interaction.user.display_name, pc_number=pc_number, keyboard_number=keyboard_number, mouse_number=mouse_number, detail=reason)