diff --git a/txscript/standard.go b/txscript/standard.go
index 77219e42b..c869c8db8 100644
--- a/txscript/standard.go
+++ b/txscript/standard.go
@@ -30,7 +30,8 @@ const (
 		ScriptVerifyMinimalData |
 		ScriptStrictMultiSig |
 		ScriptDiscourageUpgradableNops |
-		ScriptVerifyCleanStack
+		ScriptVerifyCleanStack |
+		ScriptVerifyLowS
 )
 
 // ScriptClass is an enumeration for the list of standard types of script.