diff --git a/src/components/structures/RightPanel.js b/src/components/structures/RightPanel.js
index 5aaa2a1c06..33c09e1b16 100644
--- a/src/components/structures/RightPanel.js
+++ b/src/components/structures/RightPanel.js
@@ -213,7 +213,7 @@ export default class RightPanel extends React.Component {
         const classes = classNames("mx_RightPanel", "mx_fadable", {
             "collapsed": this.props.collapsed,
             "mx_fadable_faded": this.props.disabled,
-            "dark-panel": true
+            "dark-panel": true,
         });
 
         return (