diff --git a/app/components/sd/sd.tsx b/app/components/sd/sd.tsx
index 4f5f86960..0ace62a83 100644
--- a/app/components/sd/sd.tsx
+++ b/app/components/sd/sd.tsx
@@ -133,6 +133,7 @@ export function Sd() {
               {showMaxIcon && (
                 <div className="window-action-button">
                   <IconButton
+                    aria={Locale.Chat.Actions.FullScreen}
                     icon={config.tightBorder ? <MinIcon /> : <MaxIcon />}
                     bordered
                     onClick={() => {