diff --git a/lib/web_ui/test/engine/profiler_test.dart b/lib/web_ui/test/engine/profiler_test.dart
index 58f12d17cf758..04d580d2fa969 100644
--- a/lib/web_ui/test/engine/profiler_test.dart
+++ b/lib/web_ui/test/engine/profiler_test.dart
@@ -78,7 +78,7 @@ class BenchmarkDatapoint {
   int get hashCode => hashValues(name, value);
 
   @override
-  operator ==(dynamic other) {
+  bool operator ==(dynamic other) {
     if (identical(this, other)) {
       return true;
     }