diff --git a/lib/index.js b/lib/index.js
index <HASH>..<HASH> 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -132,6 +132,7 @@ RpcClient.prototype.batch = function(batchCallback, resultCallback) {
 };
 
 RpcClient.callspec = {
+  abandonTransaction: 'str',
   addMultiSigAddress: '',
   addNode: '',
   backupWallet: '',
added abandonTransaction method to spec