diff --git a/xpra/server/auth/sys_auth_base.py b/xpra/server/auth/sys_auth_base.py
index 9b8892a9eb..f429da1c90 100644
--- a/xpra/server/auth/sys_auth_base.py
+++ b/xpra/server/auth/sys_auth_base.py
@@ -214,7 +214,7 @@ def get_sessions(self):
 class SysAuthenticator(SysAuthenticatorBase):
 
     def __init__(self, username, **kwargs):
-        super().__init__(username)
+        super().__init__(username, **kwargs)
         self.pw = None
         if POSIX:
             try: