diff --git a/wallet/wallet.go b/wallet/wallet.go
index 31547c7..4619d41 100644
--- a/wallet/wallet.go
+++ b/wallet/wallet.go
@@ -834,8 +834,7 @@ func (w *Wallet) Lock() (err error) {
 
 	// Remove clear text private keys from all address entries.
 	for _, addr := range w.addrMap {
-		zero(addr.privKeyCT)
-		addr.privKeyCT = nil
+		_ = addr.lock()
 	}
 
 	return err