diff --git a/trytond/backend/database.py b/trytond/backend/database.py
index 808c0d10c7..3ca6b181fc 100644
--- a/trytond/backend/database.py
+++ b/trytond/backend/database.py
@@ -104,8 +104,7 @@ class CursorInterface(object):
     IN_MAX = 1000
 
     def __init__(self):
-        from trytond.cache import LRUDict
-        self.cache = LRUDict(CONTEXT_CACHE_SIZE)
+        self.cache = {}
 
     def get_cache(self, context=None):
         '''