diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 19c29c7c..ce69eb84 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -620,7 +620,7 @@ Chain.prototype.locatorHashes = function locatorHashes(start) {
 };
 
 Chain.prototype.getOrphanRoot = function getOrphanRoot(hash) {
-  assert(false);
+  return bcoin.fullChain.prototype.getOrphanRoot.call(this, hash);
 };
 
 Chain.prototype.getHeight = function getHeight(hash) {