diff --git a/purchase.py b/purchase.py
index 7b5f257..0c2a427 100644
--- a/purchase.py
+++ b/purchase.py
@@ -21,7 +21,7 @@ class Purchase(metaclass=PoolMeta):
         super(Purchase, cls).__setup__()
         cls._buttons.update({
             'create_equipments': {
-                'invisible': If(Bool(Eval('equipment_createx')), True)},
+                'invisible': If(Bool(Eval('equipment_create')), True)},
         })
 
     @classmethod