diff --git a/pkg/analyzer/lib/src/dart/ast/ast.dart b/pkg/analyzer/lib/src/dart/ast/ast.dart
index 0bf2665248f..de0e0c92d7f 100644
--- a/pkg/analyzer/lib/src/dart/ast/ast.dart
+++ b/pkg/analyzer/lib/src/dart/ast/ast.dart
@@ -3305,6 +3305,9 @@ sealed class ClassMemberImpl extends DeclarationImpl implements ClassMember {
   /// Either or both of the [comment] and [metadata] can be `null` if the member
   /// doesn't have the corresponding attribute.
   ClassMemberImpl({required super.comment, required super.metadata});
+
+  /// The `augment` keyword, or `null` if the keyword was absent.
+  Token? get augmentKeyword;
 }
 
 /// The name of a class, enum, or extension type declaration.
@@ -19635,6 +19638,9 @@ final class PrimaryConstructorBodyImpl extends ClassMemberImpl
     _becomeParentOf(body);
   }
 
+  @override
+  Token? get augmentKeyword => null;
+
   @generated
   @override
   FunctionBodyImpl get body => _body;