diff --git a/documentation/index.html.erb b/documentation/index.html.erb
index 17fa1dd146..8639e7a8a5 100644
--- a/documentation/index.html.erb
+++ b/documentation/index.html.erb
@@ -1769,7 +1769,7 @@ Expressions
     closeMenus = ->
       $('.navigation.active').removeClass 'active'
 
-    $('.minibutton.run').click evalJS
+    $('.minibutton.run').click -> evalJS()
 
     # Bind navigation buttons to open the menus.
     $('.navigation').click (e) ->