diff --git a/packages/vue-i18n-core/src/i18n.ts b/packages/vue-i18n-core/src/i18n.ts
index 0500d9332..5750c2284 100644
--- a/packages/vue-i18n-core/src/i18n.ts
+++ b/packages/vue-i18n-core/src/i18n.ts
@@ -681,8 +681,6 @@ export function createI18n(options: any = {}, VueI18nLegacy?: any): any {
       // @internal
       __deleteInstance
     }
-    // make the install function synchronous to be aligned with the Vue Plugin interface
-    i18n.install = (...args) => i18n.install(...args)
     return i18n
   } else {
     // extend legacy VueI18n instance