diff --git a/lib/client/clock-client.js b/lib/client/clock-client.js
index 73ac9c3baca..f3f19ff1c55 100644
--- a/lib/client/clock-client.js
+++ b/lib/client/clock-client.js
@@ -187,7 +187,7 @@ client.render = function render () {
 };
 
 function updateClock () {
-  let timeDivisor = parseInt(client.settings.timeFormat ? client.settings.timeFormat : 12, 10);
+  let timeDivisor = parseInt(client.settings.timeFormat ? client.settings.timeFormat : 24, 10);
   let today = new Date()
     , h = today.getHours() % timeDivisor;
   if (timeDivisor === 12) {