diff --git a/ironic_python_agent/hardware.py b/ironic_python_agent/hardware.py
index da6d63384..d51e48698 100644
--- a/ironic_python_agent/hardware.py
+++ b/ironic_python_agent/hardware.py
@@ -1374,6 +1374,7 @@ class HardwareManager(object, metaclass=abc.ABCMeta):
 other hardware managers.
 :return: The modified device or None to exclude it.
 """
+ raise errors.IncompatibleHardwareMethodError()
 
 
 class GenericHardwareManager(HardwareManager):
</div><div class="naked_ctrl">
<form action="/index.cgi/speech" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://opendev.org/openstack/ironic-python-agent/commit/0ad2685ce4f37fedf6499cd6a67fca76c470c364.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://opendev.org/openstack/ironic-python-agent/commit/0ad2685ce4f37fedf6499cd6a67fca76c470c364.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech" selected="selected">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>