diff --git a/lib/blockchain.js b/lib/blockchain.js
index 52695c06..73b6875a 100644
--- a/lib/blockchain.js
+++ b/lib/blockchain.js
@@ -85,11 +85,11 @@ Blockchain.prototype.run_command = function(address, use_tmp) {
     cmd += "--nat \"" + config.nat + "\"";
   }
 
-  if (config.bootNodes.boot == true){
+  if (config.bootNodes !== undefined && config.bootNodes.boot == true) {
     cmd += "--bootnodes \"";
     for (var i = 0; i < config.bootNodes.enodes.length; i++){
       cmd += config.bootNodes.enodes[i];
-      if (i != config.bootNodes.enodes.lenth - 1) cmd += " ";
+      if (i != config.bootNodes.enodes.length - 1) cmd += " ";
     }
     cmd += "\"";
   }