diff --git a/pkgs/cupertino_http/lib/src/cupertino_web_socket.dart b/pkgs/cupertino_http/lib/src/cupertino_web_socket.dart
index 43095ff68f..9884ffe237 100644
--- a/pkgs/cupertino_http/lib/src/cupertino_web_socket.dart
+++ b/pkgs/cupertino_http/lib/src/cupertino_web_socket.dart
@@ -166,7 +166,7 @@ class CupertinoWebSocket implements WebSocket {
     }
     _task
         .sendMessage(URLSessionWebSocketMessage.fromData(Data.fromList(b)))
-        .then((_) => _, onError: _closeConnectionWithError);
+        .then((value) => value, onError: _closeConnectionWithError);
   }
 
   @override
@@ -176,7 +176,7 @@ class CupertinoWebSocket implements WebSocket {
     }
     _task
         .sendMessage(URLSessionWebSocketMessage.fromString(s))
-        .then((_) => _, onError: _closeConnectionWithError);
+        .then((value) => value, onError: _closeConnectionWithError);
   }
 
   @override