diff --git a/InvenTree/build/models.py b/InvenTree/build/models.py
index f37b55876c..e48ff35899 100644
--- a/InvenTree/build/models.py
+++ b/InvenTree/build/models.py
@@ -839,7 +839,7 @@ class Build(MPTTModel, ReferenceIndexingMixin):
         quantity = bom_item.quantity
 
         if output:
-            quantity *= output.quantity 
+            quantity *= output.quantity
         else:
             quantity *= self.quantity