diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index 9b034890fed..0e101657f54 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -57,8 +57,8 @@ class crm_lead(osv.osv):
         @param context: A standard dictionary for contextual values
         """        
         cal_obj = self.pool.get('resource.calendar') 
-        res_obj = self.pool.get('resource.resource')     
-
+        res_obj = self.pool.get('resource.resource')   
+          
         res = {}
         for lead in self.browse(cr, uid, ids , context):
             for field in fields:
@@ -81,7 +81,8 @@ class crm_lead(osv.osv):
                     resource_id = False
                     if lead.user_id:
                         resource_ids = res_obj.search(cr, uid, [('user_id','=',lead.user_id.id)])
-                        resource_id = len(resource_ids) or resource_ids[0]
+                        if resource_ids:
+                            resource_id = len(resource_ids) or resource_ids[0]
 
                     duration = float(ans.days)
                     if lead.section_id.resource_calendar_id: