diff --git a/frontend/src/app/settings/page.tsx b/frontend/src/app/settings/page.tsx
index 3c2d3cf0..4f793177 100644
--- a/frontend/src/app/settings/page.tsx
+++ b/frontend/src/app/settings/page.tsx
@@ -799,6 +799,7 @@ function KnowledgeSourcesPage() {
             <div className="space-y-2">
               <Label htmlFor="model-select" className="text-base font-medium">
                 Language model
+                <span className="text-red-500">*</span>
               </Label>
               <Select
                 value={