diff --git a/packages/core-plugin-api/src/apis/definitions/TranslationApi.ts b/packages/core-plugin-api/src/apis/definitions/TranslationApi.ts
index 3c5402e684..d96f37633b 100644
--- a/packages/core-plugin-api/src/apis/definitions/TranslationApi.ts
+++ b/packages/core-plugin-api/src/apis/definitions/TranslationApi.ts
@@ -56,7 +56,9 @@ type I18nextFormatMap = {
   };
   relativetime: {
     type: number;
-    options: Intl.RelativeTimeFormatOptions;
+    options: {
+      range?: Intl.RelativeTimeFormatUnit;
+    } & Intl.RelativeTimeFormatOptions;
   };
   list: {
     type: string[];