diff --git a/js/signal_protocol_store.js b/js/signal_protocol_store.js
index c64aa387ca25..7c9776258514 100644
--- a/js/signal_protocol_store.js
+++ b/js/signal_protocol_store.js
@@ -348,6 +348,7 @@
         },
 
     };
+    _.extend(SignalProtocolStore.prototype, Backbone.Events);
 
     window.SignalProtocolStore = SignalProtocolStore;
 })();