diff --git a/purchase.py b/purchase.py
index 932ef5f2d4..fe9cc18369 100644
--- a/purchase.py
+++ b/purchase.py
@@ -24,6 +24,7 @@ class Purchase(OSV):
                 'readonly': "state != 'draft' or bool(lines)",
             })
     reference = fields.Char('Reference', size=None, readonly=True, select=1)
+    supplier_reference = fields.Char('Supplier Reference', select=1)
     description = fields.Char('Description', size=None, states=_STATES)
     state = fields.Selection([
         ('draft', 'Draft'),
@@ -577,6 +578,9 @@ class Purchase(OSV):
             ids = self.search(cursor, user,
                     [('reference', operator, name)] + args, limit=limit,
                     context=context)
+            ids += self.search(cursor, user,
+                    [('supplier_reference', operator, name)] + args, limit=limit,
+                    context=context)
         if not ids:
             ids = self.search(cursor, user, [('party', operator, name)] + args,
                     limit=limit, context=context)
diff --git a/purchase.xml b/purchase.xml
index 504b2f5d85..ed53dd97a0 100644
--- a/purchase.xml
+++ b/purchase.xml
@@ -21,7 +21,8 @@ this repository contains the full copyright notices and license terms. -->
                     <field name="party"/>
                     <label name="invoice_address"/>
                     <field name="invoice_address"/>
-                    <newline/>
+                    <label name="supplier_reference"/>
+                    <field name="supplier_reference"/>
                     <label name="description"/>
                     <field name="description" colspan="3"/>
                     <label name="reference"/>
@@ -103,8 +104,8 @@ this repository contains the full copyright notices and license terms. -->
                             <field name="packings" colspan="4" widget="one2many"/>
                         </page>
                     </notebook>
-                    <field name="currency_digits" invisible="1"/>
-                    <field name="party_lang" invisible="1"/>
+                    <field name="currency_digits" invisible="1" colspan="6"/>
+                    <field name="party_lang" invisible="1" colspan="6"/>
                 </form>
                 ]]>
             </field>
@@ -116,7 +117,8 @@ this repository contains the full copyright notices and license terms. -->
                 <![CDATA[
                 <tree string="Purchases">
                     <field name="reference" select="1"/>
-                    <field name="purchase_date" select="1"/>
+                    <field name="supplier_reference" select="1"/>
+                    <field name="purchase_date" select="2"/>
                     <field name="party" select="1"/>
                     <field name="warehouse"/>
                     <field name="currency" select="2"/>