diff --git a/lib/storage.js b/lib/storage.js
index 10b3f6a..a966f91 100644
--- a/lib/storage.js
+++ b/lib/storage.js
@@ -242,7 +242,7 @@ Storage.prototype.fetchTx = function(walletId, txProposalId, cb) {
 
 Storage.prototype.fetchTxByHash = function(hash, cb) {
   var self = this;
-  if (!this.db) return;
+  if (!this.db) return cb();
 
   this.db.collection(collections.TXS).findOne({
     txid: hash,