diff --git a/frontend/src/App.js b/frontend/src/App.js
index da74a737..17aec56b 100644
--- a/frontend/src/App.js
+++ b/frontend/src/App.js
@@ -50,7 +50,10 @@ class App extends Component {
{(process.env.ENABLE_CSV_REPORTS === "enabled") && }
- }/>
+ {/* course-v..-like course ids */}
+ }/>
+ {/* old slash-separated course id style */}
+ }/>
}/>
}/>