diff --git a/InvenTree/stock/models.py b/InvenTree/stock/models.py
index 75d38280d0..3277137a25 100644
--- a/InvenTree/stock/models.py
+++ b/InvenTree/stock/models.py
@@ -143,6 +143,7 @@ class StockItem(MPTTModel):
         build_order=None,
         belongs_to=None,
         customer=None,
+        is_building=False,
         status__in=StockStatus.AVAILABLE_CODES
     )