diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index cf72fdddfe..c3fbd3b370 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -40,6 +40,8 @@ export default React.createClass({
         name: React.PropTypes.string.isRequired,
         room: React.PropTypes.object.isRequired,
         type: React.PropTypes.string.isRequired,
+        // Specifying 'fullWidth' as true will render the app tile to fill the width of the app drawer continer.
+        // This should be set to true when there is only one widget in the app drawer, otherwise it should be false.
         fullWidth: React.PropTypes.bool,
     },