diff --git a/stock.py b/stock.py
index 226f94f19f..85b439eea8 100644
--- a/stock.py
+++ b/stock.py
@@ -52,7 +52,7 @@ class ShipmentOut(metaclass=PoolMeta):
 
     @classmethod
     @ModelView.button
-    @Workflow.transition('cancel')
+    @Workflow.transition('cancelled')
     @process_sale('outgoing_moves')
     def cancel(cls, shipments):
         super(ShipmentOut, cls).cancel(shipments)