diff --git a/types/default-theme.d.ts b/types/default-theme.d.ts
index aec914be7fb2..ec0d69a79c23 100644
--- a/types/default-theme.d.ts
+++ b/types/default-theme.d.ts
@@ -86,9 +86,14 @@ export namespace DefaultTheme {
     activeMatch?: string
   }
 
+  export type NavItemChildren = {
+    text?: string
+    items: NavItemWithLink[]
+  }
+
   export interface NavItemWithChildren {
     text?: string
-    items: NavItem[]
+    items: (NavItemChildren | NavItemWithLink)[]
   }
 
   // sidebar -------------------------------------------------------------------