diff --git a/openerp/api.py b/openerp/api.py
index 4ab512be6a9..b377076cf55 100644
--- a/openerp/api.py
+++ b/openerp/api.py
@@ -68,7 +68,7 @@ from pprint import pformat
 from weakref import WeakSet
 from werkzeug.local import Local, release_local
 
-from openerp.tools import frozendict
+from openerp.tools import frozendict, classproperty
 
 _logger = logging.getLogger(__name__)
 
@@ -674,6 +674,10 @@ class Environment(object):
     """
     _local = Local()
 
+    @classproperty
+    def envs(cls):
+        return cls._local.environments
+
     @classmethod
     @contextmanager
     def manage(cls):
@@ -699,7 +703,7 @@ class Environment(object):
         args = (cr, uid, context)
 
         # if env already exists, return it
-        env, envs = None, cls._local.environments
+        env, envs = None, cls.envs
         for env in envs:
             if env.args == args:
                 return env
diff --git a/openerp/fields.py b/openerp/fields.py
index 036b5af82b9..1613b69cf98 100644
--- a/openerp/fields.py
+++ b/openerp/fields.py
@@ -1054,8 +1054,10 @@ class Float(Field):
     @property
     def digits(self):
         if callable(self._digits):
-            with registry().cursor() as cr:
-                return self._digits(cr)
+            # retrieve a cursor from any environment
+            from openerp.api import Environment
+            cr = next(iter(Environment.envs)).cr
+            return self._digits(cr)
         else:
             return self._digits
 
diff --git a/openerp/osv/fields.py b/openerp/osv/fields.py
index e9c2c38f97c..7bcb8606e64 100644
--- a/openerp/osv/fields.py
+++ b/openerp/osv/fields.py
@@ -388,8 +388,10 @@ class float(_column):
     @property
     def digits(self):
         if self._digits_compute:
-            with registry().cursor() as cr:
-                return self._digits_compute(cr)
+            # retrieve a cursor from any environment
+            from openerp.api import Environment
+            cr = next(iter(Environment.envs)).cr
+            return self._digits_compute(cr)
         else:
             return self._digits
 
@@ -1309,8 +1311,10 @@ class function(_column):
     @property
     def digits(self):
         if self._digits_compute:
-            with registry().cursor() as cr:
-                return self._digits_compute(cr)
+            # retrieve a cursor from any environment
+            from openerp.api import Environment
+            cr = next(iter(Environment.envs)).cr
+            return self._digits_compute(cr)
         else:
             return self._digits