diff --git a/trytond/protocols/jsonrpc.py b/trytond/protocols/jsonrpc.py
index 08e2021787..3c75cf30bc 100644
--- a/trytond/protocols/jsonrpc.py
+++ b/trytond/protocols/jsonrpc.py
@@ -55,7 +55,8 @@ JSONDecoder.register('date',
 JSONDecoder.register('time',
     lambda dct: datetime.time(dct['hour'], dct['minute'], dct['second'],
         dct['microsecond']))
-JSONDecoder.register('buffer', lambda dct: Decimal(dct['decimal']))
+JSONDecoder.register('buffer', buffer(base64.decodestring(dct['base64'])))
+JSONDecoder.register('Decimal', lambda dct: Decimal(dct['decimal']))
 
 
 class JSONEncoder(json.JSONEncoder):
diff --git a/trytond/protocols/xmlrpc.py b/trytond/protocols/xmlrpc.py
index 53f6c0f1cd..c3d97e4372 100644
--- a/trytond/protocols/xmlrpc.py
+++ b/trytond/protocols/xmlrpc.py
@@ -88,7 +88,7 @@ class XMLRPCDecoder(object):
             return self.decoders[dct['__class__']](dct)
         return dct
 
-XMLRPCDecoder.register('datetime',
+XMLRPCDecoder.register('date',
     lambda dct: datetime.date(dct['year'], dct['month'], dct['day']))
 XMLRPCDecoder.register('time',
     lambda dct: datetime.time(dct['hour'], dct['minute'], dct['second'],