diff --git a/InvenTree/part/forms.py b/InvenTree/part/forms.py
index c86027118c..986749f7b3 100644
--- a/InvenTree/part/forms.py
+++ b/InvenTree/part/forms.py
@@ -7,6 +7,7 @@ from __future__ import unicode_literals
 
 from InvenTree.forms import HelperForm
 from InvenTree.helpers import GetExportFormats
+from InvenTree.fields import RoundingDecimalFormField
 
 from mptt.fields import TreeNodeChoiceField
 from django import forms
@@ -194,6 +195,8 @@ class EditCategoryForm(HelperForm):
 class EditBomItemForm(HelperForm):
     """ Form for editing a BomItem object """
 
+    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5)
+
     class Meta:
         model = BomItem
         fields = [