diff --git a/working/simpler-parameters/feature-specification.md b/working/simpler-parameters/feature-specification.md
index 27e2a60077..ee1750f042 100644
--- a/working/simpler-parameters/feature-specification.md
+++ b/working/simpler-parameters/feature-specification.md
@@ -168,7 +168,7 @@ class InsuranceCatalogItem({
 Better, but the resulting parameter list is pretty cluttered. When combined
 with this proposal, the result is:
 
-```
+```dart
 class InsuranceCatalogItem({
   final List<String> texts,
   final Color iconColor = Colors.black,