diff --git a/lib/src/widgets/validable_annotated_editable_text.dart b/lib/src/widgets/validable_annotated_editable_text.dart
index f6fbf18ae..f88094dd5 100644
--- a/lib/src/widgets/validable_annotated_editable_text.dart
+++ b/lib/src/widgets/validable_annotated_editable_text.dart
@@ -19,7 +19,7 @@ abstract class ComparableCopy<T> {
   ///
   /// This utility function is used as the default comparator
   /// for ordering collections, for example in the [List] sort function.
-  static int compare(Comparable a, Comparable b) => a.compareTo(b);
+  static int compare(ComparableCopy a, ComparableCopy b) => a.compareTo(b);
 }