diff --git a/modules/production_split/production.py b/modules/production_split/production.py
index 0b7c2947f8..2b2340231d 100644
--- a/modules/production_split/production.py
+++ b/modules/production_split/production.py
@@ -82,7 +82,7 @@ class SplitProduction(Wizard):
     def default_start(self, fields):
         return {
             'unit': self.record.unit.id,
-            'uom_category': self.record.uom.category.id,
+            'uom_category': self.record.unit.category.id,
             }
 
     def transition_split(self):