diff --git a/InvenTree/build/serializers.py b/InvenTree/build/serializers.py
index 35a3bb3baa..2431855d3c 100644
--- a/InvenTree/build/serializers.py
+++ b/InvenTree/build/serializers.py
@@ -16,7 +16,7 @@ from rest_framework import serializers
 from rest_framework.serializers import ValidationError
 
 from InvenTree.serializers import InvenTreeModelSerializer, InvenTreeAttachmentSerializer
-from InvenTree.serializers import UserSerializerBrief
+from InvenTree.serializers import UserSerializerBrief, ReferenceIndexingSerializerMixin
 
 import InvenTree.helpers
 from InvenTree.serializers import InvenTreeDecimalField
@@ -32,7 +32,7 @@ from users.serializers import OwnerSerializer
 from .models import Build, BuildItem, BuildOrderAttachment
 
 
-class BuildSerializer(InvenTreeModelSerializer):
+class BuildSerializer(ReferenceIndexingSerializerMixin, InvenTreeModelSerializer):
     """
     Serializes a Build object
     """
diff --git a/InvenTree/order/serializers.py b/InvenTree/order/serializers.py
index 0528d57596..38a058ae6d 100644
--- a/InvenTree/order/serializers.py
+++ b/InvenTree/order/serializers.py
@@ -24,6 +24,7 @@ from InvenTree.serializers import InvenTreeAttachmentSerializer
 from InvenTree.serializers import InvenTreeModelSerializer
 from InvenTree.serializers import InvenTreeDecimalField
 from InvenTree.serializers import InvenTreeMoneySerializer
+from InvenTree.serializers import ReferenceIndexingSerializerMixin
 from InvenTree.status_codes import StockStatus
 
 from part.serializers import PartBriefSerializer
@@ -39,7 +40,7 @@ from .models import SalesOrderAllocation
 from users.serializers import OwnerSerializer
 
 
-class POSerializer(InvenTreeModelSerializer):
+class POSerializer(ReferenceIndexingSerializerMixin, InvenTreeModelSerializer):
     """ Serializer for a PurchaseOrder object """
 
     def __init__(self, *args, **kwargs):
@@ -394,7 +395,7 @@ class POAttachmentSerializer(InvenTreeAttachmentSerializer):
         ]
 
 
-class SalesOrderSerializer(InvenTreeModelSerializer):
+class SalesOrderSerializer(ReferenceIndexingSerializerMixin, InvenTreeModelSerializer):
     """
     Serializers for the SalesOrder object
     """