diff --git a/muk_session_store/patch/http.py b/muk_session_store/patch/http.py
index 7518367..0e4c4f3 100644
--- a/muk_session_store/patch/http.py
+++ b/muk_session_store/patch/http.py
@@ -25,8 +25,8 @@ from odoo.http import request
 from odoo.tools.func import lazy_property
 
 from odoo.addons.muk_utils.tools.patch import monkey_patch
-from odoo.addons.muk_session_store.store import postgres
-from odoo.addons.muk_session_store.store import redis
+from odoo.addons.muk_session_store.store.postgres import PostgresSessionStore
+from odoo.addons.muk_session_store.store.redis import RedisSessionStore
 
 _logger = logging.getLogger(__name__)
 
@@ -79,9 +79,9 @@ class Root(http.Root):
     @lazy_property
     def session_store(self):
         if tools.config.get('session_store_database'):
-            return postgres.PostgresSessionStore(session_class=http.OpenERPSession)
+            return PostgresSessionStore(session_class=http.OpenERPSession)
         elif tools.config.get('session_store_redis') and redis:
-            return redis.RedisSessionStore(session_class=http.OpenERPSession)
+            return RedisSessionStore(session_class=http.OpenERPSession)
         return super(Root, self).session_store
     
 http.root = Root()
diff --git a/muk_session_store/store/redis.py b/muk_session_store/store/redis.py
index c81597a..b2d1aef 100644
--- a/muk_session_store/store/redis.py
+++ b/muk_session_store/store/redis.py
@@ -59,11 +59,11 @@ class RedisSessionStore(SessionStore):
             password=config.get('session_store_pass', None)
         )
     
-    def _encode_session_key(self, kex):
+    def _encode_session_key(self, key):
         return key.encode('utf-8') if isinstance(key, str) else key
     
     def _get_session_key(self, sid):
-        return self._encode_session_key(self.key_prefix + sid)
+        return self._encode_session_key(self.prefix + sid)
     
     @retry_redis
     def save(self, session):