diff --git a/src/internal/util/canReportError.ts b/src/internal/util/canReportError.ts
index f66012e70c..caa98f7ea6 100644
--- a/src/internal/util/canReportError.ts
+++ b/src/internal/util/canReportError.ts
@@ -1,5 +1,5 @@
-import { isTrustedSubscriber } from '../Subscriber';
-import { ErrorObserver } from '../types';
+import { isTrustedSubscriber, Subscriber } from '../Subscriber';
+import { Subject } from '../Subject';
 
 /**
  * Determines whether the ErrorObserver is closed or stopped or has a
@@ -7,7 +7,7 @@ import { ErrorObserver } from '../types';
  * need to be reported via a different mechanism.
  * @param observer the observer
  */
-export function canReportError(observer: ErrorObserver<any>): boolean {
+export function canReportError(observer: Subscriber<any> | Subject<any>): boolean {
   while (observer) {
     const { closed, destination, isStopped } = observer as any;
     if (closed || isStopped) {