diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index e99a8c84170..ac11920f8a6 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -3041,20 +3041,33 @@ class stock_warehouse(osv.osv):
             raise osv.except_osv(_('Error!'), _('Can\'t find any customer or supplier location.'))
         return location_obj.browse(cr, uid, [customer_loc, supplier_loc], context=context)
 
+    def _location_used(self, cr, uid, location_id, warehouse, context=None):
+        pull_obj = self.pool['procurement.rule']
+        push_obj = self.pool['stock.location.path']
+        pulls = pull_obj.search(cr, uid, ['&', ('route_id', 'not in ', [x.id for x in warehouse.route_ids]), '|', ('location_src_id', '=', location_id), ('location_id', '=', location_id)], context=context)
+        pushs = push_obj.search(cr, uid, ['&', ('route_id', 'not in ', [x.id for x in warehouse.route_ids]), '|', ('location_from_id', '=', location_id), ('location_dest_id', '=', location_id)], context=context)
+        if pulls or pushs:
+            return True
+        return False
+
     def switch_location(self, cr, uid, ids, warehouse, new_reception_step=False, new_delivery_step=False, context=None):
         location_obj = self.pool.get('stock.location')
 
         new_reception_step = new_reception_step or warehouse.reception_steps
         new_delivery_step = new_delivery_step or warehouse.delivery_steps
         if warehouse.reception_steps != new_reception_step:
-            location_obj.write(cr, uid, [warehouse.wh_input_stock_loc_id.id, warehouse.wh_qc_stock_loc_id.id], {'active': False}, context=context)
+            if not self._location_used(cr, uid, warehouse.wh_input_stock_loc_id.id, warehouse, context=context):
+                location_obj.write(cr, uid, [warehouse.wh_input_stock_loc_id.id, warehouse.wh_qc_stock_loc_id.id], {'active': False}, context=context)
             if new_reception_step != 'one_step':
                 location_obj.write(cr, uid, warehouse.wh_input_stock_loc_id.id, {'active': True}, context=context)
             if new_reception_step == 'three_steps':
                 location_obj.write(cr, uid, warehouse.wh_qc_stock_loc_id.id, {'active': True}, context=context)
 
         if warehouse.delivery_steps != new_delivery_step:
-            location_obj.write(cr, uid, [warehouse.wh_output_stock_loc_id.id, warehouse.wh_pack_stock_loc_id.id], {'active': False}, context=context)
+            if not self._location_used(cr, uid, warehouse.wh_output_stock_loc_id.id, warehouse, context=context):
+                location_obj.write(cr, uid, [warehouse.wh_output_stock_loc_id.id], {'active': False}, context=context)
+            if not self._location_used(cr, uid, warehouse.wh_pack_stock_loc_id.id, warehouse, context=context):
+                location_obj.write(cr, uid, [warehouse.wh_pack_stock_loc_id.id], {'active': False}, context=context)
             if new_delivery_step != 'ship_only':
                 location_obj.write(cr, uid, warehouse.wh_output_stock_loc_id.id, {'active': True}, context=context)
             if new_delivery_step == 'pick_pack_ship':