diff --git a/src/UserActivity.js b/src/UserActivity.js
index 4e3667274c..145b23e36e 100644
--- a/src/UserActivity.js
+++ b/src/UserActivity.js
@@ -44,6 +44,7 @@ class UserActivity {
      * Can be called multiple times with the same already running timer, which is a NO-OP.
      * Can be called before the user becomes active, in which case it is only started
      * later on when the user does become active.
+     * @param {Timer} timer the timer to use
      */
     timeWhileActive(timer) {
         // important this happens first
diff --git a/src/components/views/rooms/RoomHeader.js b/src/components/views/rooms/RoomHeader.js
index 12258154ef..91ca73dd59 100644
--- a/src/components/views/rooms/RoomHeader.js
+++ b/src/components/views/rooms/RoomHeader.js
@@ -420,7 +420,11 @@ module.exports = React.createClass({
 
         let toggleRightPanelButton;
         if (this.props.isGrid) {
-            toggleRightPanelButton = <AccessibleButton className="mx_RoomHeader_button" onClick={this.onToggleRightPanelClick} title={_t('Toggle right panel')}>
+            toggleRightPanelButton =
+                <AccessibleButton
+                    className="mx_RoomHeader_button"
+                    onClick={this.onToggleRightPanelClick}
+                    title={_t('Toggle right panel')}>
                     <TintableSvg src="img/feather-icons/toggle-right-panel.svg" width="20" height="20" />
                 </AccessibleButton>;
         }