diff --git a/trytond/model/fields/date.py b/trytond/model/fields/date.py
index f5c214d761..78a45145eb 100644
--- a/trytond/model/fields/date.py
+++ b/trytond/model/fields/date.py
@@ -99,6 +99,7 @@ class Timestamp(Field):
     '''
     _type = 'timestamp'
     _sql_type = 'TIMESTAMP'
+    format = '%H:%M:%S.%f'
 
     def sql_format(self, value):
         if value is None:
diff --git a/trytond/model/model.py b/trytond/model/model.py
index 0474296cf9..0b7fe370a8 100644
--- a/trytond/model/model.py
+++ b/trytond/model/model.py
@@ -322,7 +322,7 @@ class Model(WarningErrorMixin, URLMixin, PoolBase, metaclass=ModelMeta):
                 # Set relation_field only if there is no ambiguity
                 if len(relation_fields) == 1:
                     res[field]['relation_field'], = relation_fields
-            if res[field]['type'] in ('datetime', 'time'):
+            if res[field]['type'] in ('datetime', 'time', 'timestamp'):
                 res[field]['format'] = copy.copy(cls._fields[field].format)
             if res[field]['type'] == 'selection':
                 res[field]['context'] = copy.copy(cls._fields[field].context)