diff --git a/bgpvpn_dashboard/dashboards/admin/bgpvpn/forms.py b/bgpvpn_dashboard/dashboards/admin/bgpvpn/forms.py
index 761d96b8..4cad48f4 100755
--- a/bgpvpn_dashboard/dashboards/admin/bgpvpn/forms.py
+++ b/bgpvpn_dashboard/dashboards/admin/bgpvpn/forms.py
@@ -16,7 +16,9 @@
 from django.core.urlresolvers import reverse_lazy
 from django.core.validators import RegexValidator
 from django.utils.translation import ugettext_lazy as _
+
 from horizon import forms
+
 from openstack_dashboard import api
 
 from bgpvpn_dashboard.common import bgpvpn as bgpvpn_common
@@ -25,7 +27,13 @@ from networking_bgpvpn.neutron.services.common import constants
 from bgpvpn_dashboard.dashboards.project.bgpvpn import forms \
 as project_forms
 
-RTRD_REGEX = constants.RTRD_REGEX[4:-1]
+
+if constants.RTRD_REGEX[0] == '^' and constants.RTRD_REGEX[-1] == '$':
+ RTRD_REGEX = constants.RTRD_REGEX[1:-1]
+else:
+ msg = _("Bug, inconsistency between neutron-lib and "
+ "networking-bgpvpn for RTRD regex")
+ raise Exception(msg)
 RTRDS_REGEX = '^%s( *, *%s)*$' % (RTRD_REGEX, RTRD_REGEX)
 
 
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" 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/networking-bgpvpn/commit/a747b60067d29b95fecccd328b98f527b9e8d7b7.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/networking-bgpvpn/commit/a747b60067d29b95fecccd328b98f527b9e8d7b7.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">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" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>