diff --git a/trytond/ir/attachment.py b/trytond/ir/attachment.py
index 268d6e8142..3de315d2c9 100644
--- a/trytond/ir/attachment.py
+++ b/trytond/ir/attachment.py
@@ -13,7 +13,6 @@ class Attachment(OSV):
         'name': fields.Char('Attachment Name',size=64, required=True),
         'datas': fields.Function('datas', fnct_inv='datas_inv',
             type='binary', string='Datas'),
-        'datas_fname': fields.Char('Data Filename',size=64),
         'description': fields.Text('Description'),
         'res_model': fields.Char('Resource Model',size=64,
             readonly=True, required=True),
@@ -29,8 +28,8 @@ class Attachment(OSV):
         'collision': lambda *a: 0,
     }
     _sql_constraints = [
-        ('res_model_res_id_datas_fname',
-            'UNIQUE (res_model, res_id, datas_fname)',
+        ('res_model_res_id_name',
+            'UNIQUE (res_model, res_id, name)',
             'Error! You can not create attachment with the same name!'),
     ]
 
diff --git a/trytond/ir/attachment.xml b/trytond/ir/attachment.xml
index f4253e9571..7209db3c6a 100644
--- a/trytond/ir/attachment.xml
+++ b/trytond/ir/attachment.xml
@@ -6,19 +6,17 @@
             <field name="type">form</field>
             <field name="arch" type="xml">
               <![CDATA[
-                <form string="Attachments" col="6">
+                <form string="Attachments">
                     <label name="name"/>
                     <field name="name"/>
                     <label name="res_model"/>
                     <field name="res_model"/>
                     <label name="res_id"/>
                     <field name="res_id"/>
-                    <label name="datas_fname"/>
-                    <field name="datas_fname"/>
                     <label name="datas"/>
-                    <field name="datas" colspan="3"/>
-                    <separator name="description" colspan="6"/>
-                    <field name="description" colspan="6"/>
+                    <field name="datas"/>
+                    <separator name="description" colspan="4"/>
+                    <field name="description" colspan="4"/>
                 </form>
                 ]]>
             </field>
diff --git a/trytond/ir/fr_FR.csv b/trytond/ir/fr_FR.csv
index 2e32b469b1..c47a31e779 100644
--- a/trytond/ir/fr_FR.csv
+++ b/trytond/ir/fr_FR.csv
@@ -33,7 +33,6 @@ field,"ir.action,usage",0,Usage,Utilisation,0
 field,"ir.action.wizard,action",0,Action,Action,0
 field,"ir.action.wizard,wiz_name",0,Wizard name,Nom du wizard,0
 field,"ir.attachment,datas",0,Data,Donnée,0
-field,"ir.attachment,datas_fname",0,Data Filename,Nom de fichier donnée,0
 field,"ir.attachment,description",0,Description,Description,0
 field,"ir.attachment,link",0,Link,Lien,0
 field,"ir.attachment,name",0,Attachment Name,Nom de l'attachement,0
diff --git a/trytond/webdav/webdav.py b/trytond/webdav/webdav.py
index bebca262c4..6e0c24feaf 100644
--- a/trytond/webdav/webdav.py
+++ b/trytond/webdav/webdav.py
@@ -48,7 +48,7 @@ class Directory(OSV):
                     ])
                 for attachment in attachment_obj.browse(cursor, user,
                         attachment_ids):
-                    if attachment.datas_fname == directory.name:
+                    if attachment.name == directory.name:
                         return False
         return True
 
@@ -75,7 +75,7 @@ class Directory(OSV):
                 attachment_ids = attachment_obj.search(cursor, user, [
                     ('res_model', '=', object_name),
                     ('res_id', '=', object_id),
-                    ('datas_fname', '=', name),
+                    ('name', '=', name),
                     ], limit=1, context=context)
                 if attachment_ids:
                     object_name = 'ir.attachment'
@@ -91,7 +91,7 @@ class Directory(OSV):
                 attachment_ids = attachment_obj.search(cursor, user, [
                     ('res_model', '=', object_name),
                     ('res_id', '=', object_id),
-                    ('datas_fname', '=', name),
+                    ('name', '=', name),
                     ], limit=1, context=context)
                 if attachment_ids:
                     object_name = 'ir.attachment'
@@ -139,8 +139,8 @@ class Directory(OSV):
                 ], context=context)
             for attachment in attachment_obj.browse(cursor, user, attachment_ids,
                     context=context):
-                if attachment.datas_fname and not attachment.link:
-                    res.append(attachment.datas_fname)
+                if attachment.name and not attachment.link:
+                    res.append(attachment.name)
         return res
 
     def get_resourcetype(self, cursor, user, uri, context=None):
@@ -225,7 +225,7 @@ class Directory(OSV):
                 attachment_obj.create(cursor, user, {
                     'name': name,
                     'datas': base64.encodestring(data),
-                    'datas_fname': name,
+                    'name': name,
                     'res_model': object_name,
                     'res_id': object_id,
                     }, context=context)
@@ -301,11 +301,12 @@ class Attachment(OSV):
 
     def __init__(self, pool):
         super(Attachment, self).__init__(pool)
-        self._constraints.append(
+        self._constraints = self._constraints + [
                 ('check_directory',
                     'Error! You can not create a attachment \n' \
                             'on a directory that have the same name \n' \
-                            'than a child directory.', ['datas_fname']))
+                            'than a child directory.', ['name']),
+                ]
 
     def check_directory(self, cursor, user, ids):
         directory_obj = self.pool.get('webdav.directory')