diff --git a/shell/main.js b/shell/main.js
index 2e65c96..aae109d 100644
--- a/shell/main.js
+++ b/shell/main.js
@@ -145,7 +145,8 @@ app.on('window-all-closed', function () {
 if(process.platform === 'darwin') {
     app.on('before-quit', function () {
         app.isQuiting = true;
-        walletWindow.hide();
+        if(walletWindow)
+            walletWindow.hide();
         core.kill('SIGINT');
         setTimeout(function () {
             process.exit(0);