diff --git a/docs/interactive/reactivity.qmd b/docs/interactive/reactivity.qmd
index 161dd96..8fbb6c5 100644
--- a/docs/interactive/reactivity.qmd
+++ b/docs/interactive/reactivity.qmd
@@ -130,7 +130,7 @@ bar <- rnorm(5)
 ```
 
 ```{{ojs}}
-foo + bar
+d3.sum(foo) + d3.max(bar)
 ```
 ````