diff --git a/drupal2spip_lal/base/convert.py b/drupal2spip_lal/base/convert.py
index 3ece5ff..e00af0d 100644
--- a/drupal2spip_lal/base/convert.py
+++ b/drupal2spip_lal/base/convert.py
@@ -45,7 +45,7 @@ def strong_to_dl(html):
     for key, group in grouped_items:
         group = list(group)
         if key and len(group) > 2:
-            dl = ['<dl>']
+            dl = ['<dl class="strong_to_dl">']
             for elem in group:
                 match = re.match(is_strong, elem).groupdict()
                 dl += [