diff --git a/product/ERP5/PropertySheet/Simulation.py b/product/ERP5/PropertySheet/Simulation.py
index e9384eb74b25b5587ef64eb2eff9676221e45e9d..177f0786b281a2517391150f4f495bdd30854b0b 100644
--- a/product/ERP5/PropertySheet/Simulation.py
+++ b/product/ERP5/PropertySheet/Simulation.py
@@ -65,5 +65,4 @@ class Simulation:
             'mode'        : 'w' },
   )
 
-  _categories = ('order', 'delivery', 'delivery_mode', 'incoterm', 'payment_mode', 'solver', 'specialise')
-
+  _categories = ('order', 'delivery', 'delivery_mode', 'incoterm', 'payment_mode', 'solver', 'specialise', 'mapping')