diff --git a/erpnext/manufacturing/doctype/production_order/production_order.py b/erpnext/manufacturing/doctype/production_order/production_order.py
index 7cfbab0..d3b7c5a 100644
--- a/erpnext/manufacturing/doctype/production_order/production_order.py
+++ b/erpnext/manufacturing/doctype/production_order/production_order.py
@@ -490,7 +490,7 @@
 					and detail.parent = entry.name
 					and detail.item_code = %s''', (self.name, d.item_code))[0][0]
 
-			d.db_set('transferred_qty', transferred_qty, update_modified = False)
+			d.db_set('transferred_qty', flt(transferred_qty), update_modified = False)
 
 
 @frappe.whitelist()