diff --git a/product/ERP5Security/ERP5UserManager.py b/product/ERP5Security/ERP5UserManager.py
index 5559527b775ce8089f15f90e3347b66f8ce41a42..8467ae4b115a4499c0d50178eef621d3d9743d8c 100644
--- a/product/ERP5Security/ERP5UserManager.py
+++ b/product/ERP5Security/ERP5UserManager.py
@@ -133,6 +133,7 @@ class ERP5UserManager(BasePlugin):
             if not login or not (password or ignore_password):
                 return None
 
+            login = login.strip()
             user_list = self.getUserByLogin(login)
 
             if not user_list: