diff --git a/lib/net/bip152.js b/lib/net/bip152.js
index a1a2fe96..35036baf 100644
--- a/lib/net/bip152.js
+++ b/lib/net/bip152.js
@@ -565,7 +565,7 @@ function TXRequest(options) {
   if (!(this instanceof TXRequest))
     return new TXRequest(options);
 
-  this.hash = null;
+  this.hash = encoding.NULL_HASH;
   this.indexes = [];
 
   if (options)
@@ -757,7 +757,7 @@ function TXResponse(options) {
   if (!(this instanceof TXResponse))
     return new TXResponse(options);
 
-  this.hash = null;
+  this.hash = encoding.NULL_HASH;
   this.txs = [];
 
   if (options)