diff --git a/lib/wallet/wallet-service.js b/lib/wallet/wallet-service.js
index 8a09400..08cb7ad 100644
--- a/lib/wallet/wallet-service.js
+++ b/lib/wallet/wallet-service.js
@@ -365,10 +365,7 @@ class WalletService {
    */
   _mergeEntities(active, legacy, bip49, bip84, pubkeys) {
     // Put all xpub into active.xpubs
-    active.xpubs = active.xpubs
-      .concat(legacy.xpubs)
-      .concat(bip49.xpubs)
-      .concat(bip84.xpubs)
+    active.xpubs = active.xpubs.concat(legacy.xpubs, bip49.xpubs, bip84.xpubs)
 
     // Put addresses and pubkeys into active
     // but avoid duplicates