diff --git a/lms/static/completion/js/ViewedEvent.js b/lms/static/completion/js/ViewedEvent.js
index 848312e05eee..5e45bb34174c 100644
--- a/lms/static/completion/js/ViewedEvent.js
+++ b/lms/static/completion/js/ViewedEvent.js
@@ -189,9 +189,9 @@ export class ViewedEventTracker {
         });
     }
 
-    /** Handle a visibilityStatus message from the Learning MFE. */
+    /** Handle a unit.visibilityStatus message from the Learning MFE. */
     handleVisibilityMessage(event) {
-        if (event.data.type === 'visibilityStatus') {
+        if (event.data.type === 'unit.visibilityStatus') {
           const { topPosition, viewportHeight } = event.data.data;
 
           this.elementViewings.forEach((elv) => {