diff --git a/bin/stunnel.js b/bin/stunnel.js
index 9812114..54bf72f 100755
--- a/bin/stunnel.js
+++ b/bin/stunnel.js
@@ -181,7 +181,7 @@ function daplieTunnel() {
 
 var domainsMap = {};
 
-program.locals = program.locals.concat(program.domains);
+program.locals = program.locals.concat(program.domains || []);
 program.locals.forEach(function (proxy) {
   domainsMap[proxy.hostname] = true;
 });