diff --git a/openerp/addons/base/res/res_partner.py b/openerp/addons/base/res/res_partner.py
index e43a47e01ea..441ca612935 100644
--- a/openerp/addons/base/res/res_partner.py
+++ b/openerp/addons/base/res/res_partner.py
@@ -549,8 +549,9 @@ class res_partner(osv.Model, format_address):
 
     @api.model
     def create(self, vals):
-        if vals.get('type') and not self._context.get('partner_type'):
-            self = self.with_context(partner_type=vals['type'])
+        if vals.get('type') in ['delivery', 'invoice'] and not vals.get('image'):
+            # force no colorize for images with no transparency
+            vals['image'] = self.with_context(partner_type=vals['type'])._get_default_image(False, False)
         if vals.get('website'):
             vals['website'] = self._clean_website(vals['website'])
         # function field not correctly triggered at create -> remove me when