diff --git a/lib/extensions/src/lib/config/navbar.extensions.ts b/lib/extensions/src/lib/config/navbar.extensions.ts
index 61b2188274..b2a2e33d58 100644
--- a/lib/extensions/src/lib/config/navbar.extensions.ts
+++ b/lib/extensions/src/lib/config/navbar.extensions.ts
@@ -28,4 +28,5 @@ export interface NavBarLinkRef extends ExtensionElement {
 
     url?: string; // evaluated at runtime based on route ref
     description?: string;
+    children?: Array<NavBarLinkRef>;
 }