diff --git a/addons/purchase/purchase_view.xml b/addons/purchase/purchase_view.xml
index c1abe475110..eeec28637bd 100644
--- a/addons/purchase/purchase_view.xml
+++ b/addons/purchase/purchase_view.xml
@@ -174,7 +174,7 @@
                     <separator orientation="vertical"/>
                     <filter icon="terp-emblem-important" name="exception" string="Exception" domain="[('state','in',('except_invoice','except_picking'))]" separator="1" help="Purchase order which are in the exception state"/>
                     <separator orientation="vertical"/>
-                    <filter icon="terp-gtk-go-back-rtl" string="To Invoice" domain="[('invoiced','=',1)]" separator="1" help="Purchase order to be invoiced"/>
+                    <filter icon="terp-gtk-go-back-rtl" string="To be Invoiced" domain="[('invoiced','=',1)]" separator="1" help="Purchase order to be invoiced"/>
                     <separator orientation="vertical"/>
                     <field name="name" select="1" string="Reference"/>
                     <field name="partner_id" select="1"/>
@@ -184,7 +184,7 @@
                 <newline/>
                   <group expand="0" string="Group By..." colspan="4" col="10" groups="base.group_extended">
                     <filter string="Supplier" icon="terp-personal" domain="[]" context="{'group_by':'partner_id'}"/>
-                    <filter string="Source Document" icon="terp-gtk-jump-to-rtl" domain="[]" context="{'group_by':'origin'}"/>
+                    <filter string="Origin" icon="terp-gtk-jump-to-rtl" domain="[]" context="{'group_by':'origin'}"/>
                     <separator orientation="vertical"/>
                     <filter string="State" icon="terp-stock_effects-object-colorize" domain="[]" context="{'group_by':'state'}"/>
                      <separator orientation="vertical"/>
diff --git a/addons/purchase/wizard/purchase_order_group.py b/addons/purchase/wizard/purchase_order_group.py
index 8d2e17609e8..08b2ee5c4ed 100644
--- a/addons/purchase/wizard/purchase_order_group.py
+++ b/addons/purchase/wizard/purchase_order_group.py
@@ -24,11 +24,28 @@ from osv import fields, osv
 import netsvc
 import pooler
 from osv.orm import browse_record, browse_null
+from tools.translate import _
 
 class purchase_order_group(osv.osv_memory):
     _name = "purchase.order.group"
     _description = "Purchase Order Merge"
-
+    
+    def fields_view_get(self, cr, uid, view_id=None, view_type='form', 
+                        context=None, toolbar=False, submenu=False):
+        """ 
+         Changes the view dynamically
+         @param self: The object pointer.
+         @param cr: A database cursor
+         @param uid: ID of the user currently logged in
+         @param context: A standard dictionary 
+         @return: New arch of view.
+        """
+        if not context:
+            context={}
+        res = super(purchase_order_group, self).fields_view_get(cr, uid, view_id=view_id, view_type=view_type, context=context, toolbar=toolbar,submenu=False)
+        if context.get('active_model','') == 'purchase.order' and len(context['active_ids']) < 2:
+            raise osv.except_osv(_('Warning'),
+            _('Please select multiple order inventories to merge in the list view.'))
     def merge_orders(self, cr, uid, ids, context):
         """
              To merge similar type of purchase orders.