diff --git a/src/authenticators/ldap_admin.py b/src/authenticators/ldap_admin.py
index 7f96165cb..872dd3c8d 100644
--- a/src/authenticators/ldap_admin.py
+++ b/src/authenticators/ldap_admin.py
@@ -120,7 +120,6 @@ class Authenticator(BaseAuthenticator):
 
         return infos
 
-    @staticmethod
     def delete_session_cookie(self):
 
         from bottle import response