diff --git a/addons/email_template/wizard/email_template_send_wizard.py b/addons/email_template/wizard/email_template_send_wizard.py
index 5e0f0619c1b..4b1aba3a2aa 100755
--- a/addons/email_template/wizard/email_template_send_wizard.py
+++ b/addons/email_template/wizard/email_template_send_wizard.py
@@ -68,6 +68,8 @@ class email_template_send_wizard(osv.osv_memory):
         return template
 
     def _get_template_value(self, cr, uid, field, context=None):
+        if context is None:
+            context = {}
         template = self._get_template(cr, uid, context)
         if not template:
             return False
@@ -119,6 +121,8 @@ class email_template_send_wizard(osv.osv_memory):
     }
 
     def fields_get(self, cr, uid, fields=None, context=None, write_access=True):
+        if context is None:
+            context = {}
         result = super(email_template_send_wizard, self).fields_get(cr, uid, fields, context, write_access)
         if 'attachment_ids' in result and 'src_model' in context:
             result['attachment_ids']['domain'] = [('res_model','=',context['src_model']),('res_id','=',context['active_id'])]
@@ -165,6 +169,8 @@ class email_template_send_wizard(osv.osv_memory):
             else:
                 return value
 
+        if context is None:
+            context = {}
         mail_ids = []
         template = self._get_template(cr, uid, context)
         for id in context['src_rec_ids']: