diff --git a/main.js b/main.js
index 180a862..cd297d8 100644
--- a/main.js
+++ b/main.js
@@ -50,7 +50,7 @@ app.on('window-all-closed', function () {
 app.on('activate', function () {
   // On OS X it's common to re-create a window in the app when the
   // dock icon is clicked and there are no other windows open.
-  if (mainWindow === null) {
+  if (win === null) {
     createWindow()
   }
 })