diff --git a/LanguageFeatures/Extension-types/syntax_A08_t03.dart b/LanguageFeatures/Extension-types/syntax_A08_t03.dart
index 0b3079531a..7aa9220c8b 100644
--- a/LanguageFeatures/Extension-types/syntax_A08_t03.dart
+++ b/LanguageFeatures/Extension-types/syntax_A08_t03.dart
@@ -31,6 +31,8 @@
 // SharedOptions=--enable-experiment=inline-class
 
 extension type ET1(int id) {
+//                     ^^
+// [cfe] unspecified
   external int id;
 //             ^^
 // [analyzer] unspecified
@@ -38,6 +40,8 @@ extension type ET1(int id) {
 }
 
 extension type ET2<T>(T id) {
+//                      ^^
+// [cfe] unspecified
   external final T id;
 //                 ^^
 // [analyzer] unspecified