diff --git a/js/components/main.js b/js/components/main.js
index 2f1968d9fb8..d776761fd2e 100644
--- a/js/components/main.js
+++ b/js/components/main.js
@@ -123,7 +123,7 @@ class Main extends ImmutableComponent {
     })
   }
 
-  registerCustomTitlebarHandlers() {
+  registerCustomTitlebarHandlers () {
     if (this.customTitlebar.enabled) {
       document.addEventListener('keyup', (e) => {
         const customTitlebar = this.customTitlebar