diff --git a/js/ui/dateMenu.js b/js/ui/dateMenu.js
index 2dfdd374f..7fc7c3828 100644
--- a/js/ui/dateMenu.js
+++ b/js/ui/dateMenu.js
@@ -481,7 +481,6 @@ class MessagesIndicator extends St.Icon {
 
         this._sources = [];
         this._count = 0;
-        this._doNotDisturb = false;
 
         this._settings = new Gio.Settings({
             schema_id: 'org.gnome.desktop.notifications',