diff --git a/content.js b/content.js
index 32ae7dd5f6a9cad557b6ace42a90c58fd915a6b1..9ec6ab43bdb6d67bbc991531d03c3836da2c1ce1 100644
--- a/content.js
+++ b/content.js
@@ -611,7 +611,7 @@ let Content = {
     order: 15
   },
 
-  events: {
+  'events': {
     instructions: `Now we want to upgrade our keyboard. We would like to show the
     note names on the buttons only when the mouse pointer enters the button, and remove them
     when the mouse pointer leaves the button. For this purpose we can use the events "mouseenter"