diff --git a/web/app/assets/javascripts/scheduled_session.js b/web/app/assets/javascripts/scheduled_session.js
index 4fdec4dd8..8004d2866 100644
--- a/web/app/assets/javascripts/scheduled_session.js
+++ b/web/app/assets/javascripts/scheduled_session.js
@@ -253,7 +253,7 @@
               instruments_rsvp[slot.description]["count"] = instruments_rsvp[slot.description]["count"] + 1;
             }
             else {
-              instrumens_rsvp[slot.description] = {"count": 1, "level": slot.proficiency_desc};
+              instruments_rsvp[slot.description] = {"count": 1, "level": slot.proficiency_desc};
             }
           });