diff --git a/src/client/theme-default/composables/outline.ts b/src/client/theme-default/composables/outline.ts
index e17a005c..067b2b1a 100644
--- a/src/client/theme-default/composables/outline.ts
+++ b/src/client/theme-default/composables/outline.ts
@@ -13,7 +13,6 @@ export function resolveTitle(theme: DefaultTheme.Config): string {
     (typeof theme.outline === 'object' &&
       !Array.isArray(theme.outline) &&
       theme.outline.label) ||
-    theme.outlineTitle ||
     'On this page'
   )
 }
diff --git a/types/default-theme.d.ts b/types/default-theme.d.ts
index 0b87539b..fa6985ac 100644
--- a/types/default-theme.d.ts
+++ b/types/default-theme.d.ts
@@ -30,13 +30,6 @@ export namespace DefaultTheme {
      */
     outline?: Outline | Outline['level'] | false
 
-    /**
-     * @deprecated Use `outline.label` instead.
-     *
-     * @default 'On this page'
-     */
-    outlineTitle?: string
-
     /**
      * The nav items.
      */