diff --git a/src/core/constants.py b/src/core/constants.py
index 2e1eaab5..b00fbdc2 100644
--- a/src/core/constants.py
+++ b/src/core/constants.py
@@ -46,6 +46,8 @@ class Const(object):
     GENERAL = "general"
     # General parameters
     HISTORY_LIMIT = "History"
+    SHOW_OFFLINE_CONTACTS = "Offline contacts"
+    SHOW_EMPTY_GROUPS = "Empty groups"
     # Parameters related to connection
     FORCE_SERVER_PARAM = "Force server"
     FORCE_PORT_PARAM = "Force port"
diff --git a/src/memory/params.py b/src/memory/params.py
index f8158785..a04e98b1 100644
--- a/src/memory/params.py
+++ b/src/memory/params.py
@@ -45,6 +45,8 @@ class Params(object):
         <category name="General" label="%(category_general)s">
             <param name="Password" value="" type="password" />
             <param name="%(history_param)s" label="%(history_label)s" value="20" constraint="0;100" type="int" security="0" />
+            <param name="%(show_offline_contacts)s" label="%(show_offline_contacts_label)s" value="false" type="bool" security="0" />
+            <param name="%(show_empty_groups)s" label="%(show_empty_groups_label)s" value="false" type="bool" security="0" />
         </category>
         <category name="Connection" label="%(category_connection)s">
             <param name="JabberID" value="name@example.org/SàT" type="string" />
@@ -66,6 +68,10 @@ class Params(object):
         'category_connection': D_("Connection"),
         'history_param': C.HISTORY_LIMIT,
         'history_label': D_('Chat history limit'),
+        'show_offline_contacts': C.SHOW_OFFLINE_CONTACTS,
+        'show_offline_contacts_label': D_('Show offline contacts'),
+        'show_empty_groups': C.SHOW_EMPTY_GROUPS,
+        'show_empty_groups_label': D_('Show empty groups'),
         'force_server_param': C.FORCE_SERVER_PARAM,
         'force_port_param': C.FORCE_PORT_PARAM,
         'new_account_label': D_("Register new account"),