diff --git a/Sources/BSVNetwork/HTTP/URLSessionHTTPTransport.swift b/Sources/BSVNetwork/HTTP/URLSessionHTTPTransport.swift
index d4d6800..c3b3ce4 100644
--- a/Sources/BSVNetwork/HTTP/URLSessionHTTPTransport.swift
+++ b/Sources/BSVNetwork/HTTP/URLSessionHTTPTransport.swift
@@ -89,6 +89,7 @@ private final class URLSessionRequestOperation: NSObject, @unchecked Sendable {
             return task
         }
         taskToCancel?.cancel()
+        finish(.failure(NetworkServiceError.cancelled))
     }
 
     private func start(