diff --git a/product/ERP5Form/Document/Preference.py b/product/ERP5Form/Document/Preference.py
index 02c18e548b037f7ebcdb48aab847a4df74d1418b..2978aabdc0fe6968bdd0d62090e698369beda289 100644
--- a/product/ERP5Form/Document/Preference.py
+++ b/product/ERP5Form/Document/Preference.py
@@ -55,6 +55,7 @@ class Preference( Folder ):
                     , PropertySheet.Preference
                     , PropertySheet.AccountingPreference
                     , PropertySheet.SubversionPreference
+                    , PropertySheet.HtmlStylePreference
                     )
   
   # Declarative security