diff --git a/dislocker_slash.py b/dislocker_slash.py
index 4b15eca..7fe8d71 100644
--- a/dislocker_slash.py
+++ b/dislocker_slash.py
@@ -390,12 +390,12 @@ class DL():
                                 # PCリストの該当のレコードを更新
                                 cursor.execute("UPDATE pc_list SET using_member_id = %s, password_hash = %s WHERE pc_number = %s", (member_id, password_hash, user_info["pc_number"]))
                                 # キーボードリストの該当のレコードを自前(None)だったらスキップ、借りていたら更新
-                                if user_info["keyboard_number"] == None:
+                                if user_info["keyboard_number"] == 0:
                                     pass
                                 else:
                                     cursor.execute("UPDATE keyboard_list SET using_member_id = %s WHERE keyboard_number = %s", (member_id, user_info["keyboard_number"]))
                                 # マウスも同様に
-                                if user_info["mouse_number"] == None:
+                                if user_info["mouse_number"] == 0:
                                     pass
                                 else:
                                     cursor.execute("UPDATE mouse_list SET using_member_id = %s WHERE mouse_number = %s", (member_id, user_info["mouse_number"]))