diff --git a/accounting/accounting_config.py b/accounting/accounting_config.py
index 465ca2e..9a6f7ec 100644
--- a/accounting/accounting_config.py
+++ b/accounting/accounting_config.py
@@ -222,7 +222,7 @@ where accountid=${accid}$
 			await sor.C('acc_balance', ns.copy())
 		else:
 			ns = recs[0]
-			ns['balance'] += new_balance
+			ns['balance'] = new_balance
 			await sor.U('acc_balance', ns.copy())
 
 		# summary = self.summary