diff --git a/lib/blockchain.js b/lib/blockchain.js
index 45b748ae..1a986df0 100644
--- a/lib/blockchain.js
+++ b/lib/blockchain.js
@@ -80,6 +80,10 @@ Blockchain.prototype.run_command = function(address, use_tmp) {
   if (address !== void 0) {
     cmd += "--unlock " + address + " ";
   }
+  
+  if (config.nat !== "any"){
+    cmd += "--nat \"" + config.nat "\"";
+  }
 
   if (config.bootNodes.boot == true){
     cmd += "--bootnodes \"";