diff --git a/wallet/mixing.go b/wallet/mixing.go
index 867fc3718..3c20e1227 100644
--- a/wallet/mixing.go
+++ b/wallet/mixing.go
@@ -7,7 +7,6 @@ package wallet
 import (
 	"context"
 	cryptorand "crypto/rand"
-	"time"
 
 	"decred.org/dcrwallet/v4/errors"
 	"decred.org/dcrwallet/v4/wallet/txrules"
@@ -174,8 +173,7 @@ func (w *mixingWallet) PublishTransaction(ctx context.Context, tx *wire.MsgTx) e
 
 func (w *Wallet) dicemixExpiry(ctx context.Context) uint32 {
 	_, height := w.MainChainTip(ctx)
-	target := w.chainParams.TargetTimePerBlock
-	return uint32(height) + uint32(2*time.Hour/target)
+	return mixing.MaxExpiry(uint32(height), w.chainParams)
 }
 
 // addCoinJoinInput adds a wallet's controlled UTXO to the coinjoin