diff --git a/slides/chapter-13.en.md b/slides/chapter-13.en.md
index bb28fbb..ee3741c 100644
--- a/slides/chapter-13.en.md
+++ b/slides/chapter-13.en.md
@@ -180,7 +180,7 @@ sec:section3,sec:section5}.
 ![](svg/chapter-13/cref-multiple-example-crop.svg)
 
 
-slide(layout=task)
+@slide(layout=task)
 
 @task-number
 13