diff --git a/mining.go b/mining.go
index d02467bd..d8ac0a06 100644
--- a/mining.go
+++ b/mining.go
@@ -48,6 +48,7 @@ const (
 	// are more strict.
 	standardScriptVerifyFlags = txscript.ScriptBip16 |
 		txscript.ScriptVerifyDERSignatures |
+		txscript.ScriptVerifyStrictEncoding |
 		txscript.ScriptVerifyMinimalData |
 		txscript.ScriptStrictMultiSig |
 		txscript.ScriptDiscourageUpgradableNops