diff --git a/openerp/modules/module.py b/openerp/modules/module.py
index b9f19293fee5dc1766b2c8466cf60a5f4e50ff07..8a72fd6f95484290932d570a46fff17f173ca646 100644
--- a/openerp/modules/module.py
+++ b/openerp/modules/module.py
@@ -65,7 +65,7 @@ class AddonsImportHook(object):
     thus `import openerp.addons.module`.
     """
 
-    def find_module(self, module_name, package_path):
+    def find_module(self, module_name, package_path=None):
         module_parts = module_name.split('.')
         if len(module_parts) == 3 and module_name.startswith('openerp.addons.'):
             return self # We act as a loader too.