diff --git a/bigbluebutton-html5/imports/utils/deviceType.js b/bigbluebutton-html5/imports/utils/deviceType.js
index f210ed04fd..478e8bfa72 100644
--- a/bigbluebutton-html5/imports/utils/deviceType.js
+++ b/bigbluebutton-html5/imports/utils/deviceType.js
@@ -1,4 +1,6 @@
 const deviceType = () => {
+  // Listing of Device Viewport sizes, Updated : March 25th, 2018
+  // http://mediag.com/news/popular-screen-resolutions-designing-for-all/
   const MAX_PHONE_SHORT_SIDE = 480;
 
   const smallSide = window.screen.width < window.screen.height