diff --git a/src/components/structures/LoggedInView.js b/src/components/structures/LoggedInView.js
index 5dca359f32..a8ef8adbcc 100644
--- a/src/components/structures/LoggedInView.js
+++ b/src/components/structures/LoggedInView.js
@@ -259,12 +259,13 @@ const LoggedInView = React.createClass({
         // When the panels are disabled, clicking on them results in a mouse event
         // which bubbles to certain elements in the tree. When this happens, close
         // any settings page that is currently open (user/room/group).
+        const targetClasses = new Set(ev.target.className.split(' '));
         if (this.props.leftDisabled &&
             this.props.rightDisabled &&
             (
-                ev.target.className === 'mx_MatrixChat' ||
-                ev.target.className === 'mx_MatrixChat_middlePanel' ||
-                ev.target.className === 'mx_RoomView'
+                targetClasses.has('mx_MatrixChat') ||
+                targetClasses.has('mx_MatrixChat_middlePanel') ||
+                targetClasses.has('mx_RoomView')
             )
         ) {
             dis.dispatch({ action: 'close_settings' });