diff --git a/src/index.d.ts b/src/index.d.ts
index 18e11aac6..13871eb84 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -89,6 +89,7 @@ export const NamespacesConsumer: React.ComponentClass<NamespacesConsumerProps>;
 export interface I18nextProviderProps {
   i18n: i18next.i18n;
   defaultNS?: string;
+  reportNS?: (ns: string) => void;
   initialI18nStore?: {};
   initialLanguage?: string;
 }