diff --git a/InvenTree/order/models.py b/InvenTree/order/models.py
index 99c71d1c3e..248ecb277d 100644
--- a/InvenTree/order/models.py
+++ b/InvenTree/order/models.py
@@ -747,8 +747,15 @@ class PurchaseOrderLineItem(OrderLineItem):
     )
 
     def get_base_part(self):
-        """ Return the base-part for the line item """
-        return self.part.part
+        """
+        Return the base part.Part object for the line item
+        
+        Note: Returns None if the SupplierPart is not set!
+        """
+        if self.part is None:
+            return None
+        else:
+            return self.part.part
 
     # TODO - Function callback for when the SupplierPart is deleted?