diff --git a/RxSwift/Observable+Concurrency.swift b/RxSwift/Observable+Concurrency.swift
index 45ad05ede..af3ec72bc 100644
--- a/RxSwift/Observable+Concurrency.swift
+++ b/RxSwift/Observable+Concurrency.swift
@@ -66,6 +66,8 @@ public extension AsyncSequence {
                         observer.onNext(value)
                     }
 
+                    observer.onCompleted()
+                } catch is CancellationError {
                     observer.onCompleted()
                 } catch {
                     observer.onError(error)