diff --git a/src/app/window-actions.ts b/src/app/window-actions.ts
index e0faff3e..48eb9de3 100644
--- a/src/app/window-actions.ts
+++ b/src/app/window-actions.ts
@@ -146,7 +146,7 @@ export const handleKeyPress = (key: number): void => {
             break;
         }
         case KeyCodes.Alt:
-            if (isMac) {
+            if (isMac || windowHandler.isCustomTitleBar) {
                 return;
             }
             const browserWin = BrowserWindow.getFocusedWindow() as ICustomBrowserWindow;