diff --git a/types/rsocket-flowable/Single.d.ts b/types/rsocket-flowable/Single.d.ts
index f4c566c0df..6e2d90934c 100644
--- a/types/rsocket-flowable/Single.d.ts
+++ b/types/rsocket-flowable/Single.d.ts
@@ -46,7 +46,7 @@ export interface IFutureSubject<T> {
  */
 export default class Single<T> {
     static of<U>(value: U): Single<U>;
-    static error(error: Error): Single<{}>;
+    static error(error: Error): Single<never>;
     constructor(source: Source<T>);
     subscribe(partialSubscriber?: Partial<IFutureSubscriber<T>>): void;
     flatMap<R>(fn: (data: T) => Single<R>): Single<R>;