diff --git a/openerp/tools/translate.py b/openerp/tools/translate.py
index 532d52e4f60..7099639debd 100644
--- a/openerp/tools/translate.py
+++ b/openerp/tools/translate.py
@@ -859,8 +859,9 @@ def trans_generate(lang, modules, cr):
 
     def get_module_from_path(path):
         for (mp, rec) in path_list:
+            mp = os.path.join(mp, '')
             if rec and path.startswith(mp) and os.path.dirname(path) != mp:
-                path = path[len(mp)+1:]
+                path = path[len(mp):]
                 return path.split(os.path.sep)[0]
         return 'base' # files that are not in a module are considered as being in 'base' module