diff --git a/packages/client/src/components/ui/window.vue b/packages/client/src/components/ui/window.vue
index 547543770..6892b1924 100644
--- a/packages/client/src/components/ui/window.vue
+++ b/packages/client/src/components/ui/window.vue
@@ -99,12 +99,12 @@ export default defineComponent({
 		buttonsLeft: {
 			type: Array,
 			required: false,
-			default: [],
+			default: () => [],
 		},
 		buttonsRight: {
 			type: Array,
 			required: false,
-			default: [],
+			default: () => [],
 		},
 	},