diff --git a/lib/platform-info.js b/lib/platform-info.js
index 68127f88..ec447397 100644
--- a/lib/platform-info.js
+++ b/lib/platform-info.js
@@ -38,7 +38,7 @@ var utils        = require('./utils');
 var execP = Promise.denodeify(utils.execute);
 
 function checkInstalledLinux(pkg) {
-  return execP("dpkg", ["-s", pkg]).then(function(result) {
+  return execP("dpkg", ["-s", pkg]).then(function() {
     return Promise.resolve();
   }).catch(function() {
     var msg = "missing package: " + pkg + ". Please install it";