diff --git a/lib/bcoin/http/rpc.js b/lib/bcoin/http/rpc.js
index 832426e4..9cb9002f 100644
--- a/lib/bcoin/http/rpc.js
+++ b/lib/bcoin/http/rpc.js
@@ -1193,7 +1193,7 @@ RPC.prototype.getblocktemplate = function getblocktemplate(args, callback) {
       if (block.prevBlock !== self.chain.tip.hash)
         return callback(new RPCError('inconclusive-not-best-prevblk'));
 
-      return self.chain.add(block, function(err) {
+      return this.chain.add(block, function(err) {
         if (err) {
           if (err.reason)
             return callback(null, err.reason);