diff --git a/web/app/assets/javascripts/fakeJamClient.js b/web/app/assets/javascripts/fakeJamClient.js
index f4b1db377..0f22eaee2 100644
--- a/web/app/assets/javascripts/fakeJamClient.js
+++ b/web/app/assets/javascripts/fakeJamClient.js
@@ -758,6 +758,10 @@
             metronomeActive=false
         }
 
+        function setMetronomeOpenCallback(callback) {
+
+        }
+
         // stun
         function NetworkTestResult() { return {remote_udp_blocked: false} }
 
@@ -1057,14 +1061,17 @@
         this.GetScoreWorkTimingInterval = GetScoreWorkTimingInterval;
         this.SetScoreWorkTimingInterval = SetScoreWorkTimingInterval;
 
+        // Backing tracks:
         this.getBackingTrackList = getBackingTrackList;
         this.SessionCloseBackingTrackFile = SessionCloseBackingTrackFile;
         this.SessionOpenBackingTrackFile = SessionOpenBackingTrackFile;
         this.SessionSetBackingTrackFileLoop = SessionSetBackingTrackFileLoop;
 
+        // Metronome:
         this.SessionCloseMetronome = SessionCloseMetronome;
         this.SessionOpenMetronome = SessionOpenMetronome;
         this.SessionSetMetronome = SessionSetMetronome;
+        this.setMetronomeOpenCallback = setMetronomeOpenCallback;
 
         // Client Update
         this.IsAppInWritableVolume = IsAppInWritableVolume;