diff --git a/lib/hooks.dart b/lib/hooks.dart
index a6b3b94b..5a0a295d 100644
--- a/lib/hooks.dart
+++ b/lib/hooks.dart
@@ -23,6 +23,9 @@ class StateHook<T> {
   final T _value;
 
   /// The second item in the pair returned by [React.useState].
+  ///
+  /// This has a type of `dynamic` since it accepts either the value `T`,
+  /// or an updater function `T Function(T)`.
   final void Function(dynamic) _setValue;
 
   StateHook._(this._value, this._setValue);