diff --git a/packages/flutter/lib/src/scheduler/ticker.dart b/packages/flutter/lib/src/scheduler/ticker.dart index e1800b3c7073512adea5b18900515c4d00110631..47058eed429f77fc800815b825eceef55ce800a2 100644 --- a/packages/flutter/lib/src/scheduler/ticker.dart +++ b/packages/flutter/lib/src/scheduler/ticker.dart @@ -433,8 +433,8 @@ class TickerFuture implements Future<void> { } @override - Future<E> then<E>(dynamic f(void value), { Function onError }) { - return _primaryCompleter.future.then<E>(f, onError: onError); + Future<R> then<R>(FutureOr<R> onValue(void value), { Function onError }) { + return _primaryCompleter.future.then<R>(onValue, onError: onError); } @override