diff --git a/addons/wiki/wizard/wiki_make_index.py b/addons/wiki/wizard/wiki_make_index.py
index 90528652587..effb9023b4a 100644
--- a/addons/wiki/wizard/wiki_make_index.py
+++ b/addons/wiki/wizard/wiki_make_index.py
@@ -56,8 +56,8 @@ class wiki_make_index(osv.osv_memory):
             
             if check:
                 for i in check:
-                    match = re.match('[a-zA-Z_%-+$*&^#@!]', i[0])
-                    if match:
+                    match = re.match('[0-9]', i[0])
+                    if not match:
                         raise osv.except_osv(_('Warning !'), _('The section values must be like 1/1.1/1.3.4'))
             lst = []
             s_ids = {}