diff --git a/theme/src/shared/options/locale.ts b/theme/src/shared/options/locale.ts
index d789964a..c9f2dc77 100644
--- a/theme/src/shared/options/locale.ts
+++ b/theme/src/shared/options/locale.ts
@@ -244,7 +244,7 @@ export interface PlumeThemeLocaleData extends LocaleData {
    *
    * @default true
    */
-  externalLinkIcon?: string
+  externalLinkIcon?: boolean
 
   /**
    * 页脚配置。