diff --git a/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.py b/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.py
index e4cdcb4..2029b07 100644
--- a/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.py
+++ b/erpnext/stock/doctype/stock_reconciliation/stock_reconciliation.py
@@ -72,7 +72,7 @@
 
 				if item_dict.get("serial_nos"):
 					item.current_serial_no = item_dict.get("serial_nos")
-					if self.purpose == "Stock Reconciliation" and not item.serial_no::
+					if self.purpose == "Stock Reconciliation" and not item.serial_no:
 						item.serial_no = item.current_serial_no
 
 				item.current_qty = item_dict.get("qty")