diff --git a/product/ERP5/Tool/SimulationTool.py b/product/ERP5/Tool/SimulationTool.py
index 922a3a4b4c6b450bbb00e41d4653de545d335d6b..17d21de027061aa7e3dd6141cb20b315beb4ab85 100644
--- a/product/ERP5/Tool/SimulationTool.py
+++ b/product/ERP5/Tool/SimulationTool.py
@@ -278,7 +278,7 @@ class SimulationTool(BaseTool):
       if strict_simulation_state:
         if isinstance(simulation_state, string_or_list)\
                 and simulation_state:
-           simulation_query = Query(
+           simulation_query = SimpleQuery(
                    **{'stock.simulation_state': simulation_state})
       else:
         # first, we evaluate simulation_state