diff --git a/lib/src/react_client/event_helpers.dart b/lib/src/react_client/event_helpers.dart
index 7906983b..2688fc01 100644
--- a/lib/src/react_client/event_helpers.dart
+++ b/lib/src/react_client/event_helpers.dart
@@ -598,6 +598,7 @@ extension SyntheticEventTypeHelpers on SyntheticEvent {
   bool get isFocusEvent => this is SyntheticFocusEvent;
 
   /// Returns whether this is a [SyntheticFormEvent].
+  @Deprecated('Check the event \'type\' property instead. This will be removed in v6.0.0.')
   bool get isFormEvent => this is SyntheticFormEvent;
 
   /// Returns whether this is a [SyntheticMouseEvent].