diff --git a/db/up/rsvp_cancel_count.sql b/db/up/rsvp_cancel_count.sql
new file mode 100644
index 000000000..e69de29bb
diff --git a/web/app/assets/javascripts/dialog/shutdownDialog.js b/web/app/assets/javascripts/dialog/shutdownDialog.js
index 97ad8baea..05bf73149 100644
--- a/web/app/assets/javascripts/dialog/shutdownDialog.js
+++ b/web/app/assets/javascripts/dialog/shutdownDialog.js
@@ -24,7 +24,10 @@
     }
 
     function initialize() {
-      context.jamClient.RegisterQuitCallback("window.JK.ShutdownDialogCallback");
+      // guard against old clients
+      if(context.jamClient.RegisterQuitCallback) {
+        context.jamClient.RegisterQuitCallback("window.JK.ShutdownDialogCallback");
+      }
     }
 
     function quitCallback(options) {