diff --git a/library/Billrun/Calculator/Unify.php b/library/Billrun/Calculator/Unify.php
index 040482a8c70fe6debd53de6e2471ab9a6a225f74..1e2ca0231d343f99a2633f913dc851d136a822f5 100644
--- a/library/Billrun/Calculator/Unify.php
+++ b/library/Billrun/Calculator/Unify.php
@@ -324,7 +324,8 @@ class Billrun_Calculator_Unify extends Billrun_Calculator {
 	}
 
 	public function isNsnLineLegitimate($line) {
-		if ((isset($line['arate']) && $line['arate'] !== false) || (isset($line['usaget']) && (isset($line['sid']) || (isset($line['record_type']) && ($line['record_type'] == '30' || $line['record_type'] == '31'))))) {
+		if ((isset($line['arate']) && $line['arate'] !== false) || (isset($line['usaget']) && (isset($line['sid']) || (isset($line['record_type']) && ($line['record_type'] == '30' || $line['record_type'] == '31')))) ||
+			(in_array($line['out_circuit_group'], array('2090','2091','2092')))) {
 			return false;
 		}
 		return true;