diff --git a/lib/workers/workerpool.js b/lib/workers/workerpool.js
index dbbcdd85..1ceac2ee 100644
--- a/lib/workers/workerpool.js
+++ b/lib/workers/workerpool.js
@@ -392,7 +392,7 @@ WorkerPool.prototype.ecVerify = co(function* ecVerify(msg, sig, key) {
  */
 
 WorkerPool.prototype.ecSign = co(function* ecSign(msg, key) {
-  var packet = new packets.SignPacket(msg, key);
+  var packet = new packets.ECSignPacket(msg, key);
   var result = yield this.execute(packet, -1);
   return result.sig;
 });