diff --git a/lib/mining/template.js b/lib/mining/template.js
index b259a969..91c97155 100644
--- a/lib/mining/template.js
+++ b/lib/mining/template.js
@@ -53,7 +53,7 @@ function BlockTemplate(options) {
   this.interval = 210000;
   this.fees = 0;
   this.tree = new MerkleTree();
-  this.commitment = DUMMY;
+  this.commitment = encoding.ZERO_HASH;
   this.left = DUMMY;
   this.right = DUMMY;
   this.items = [];