diff --git a/src/browser/themes/shared/zen-browser-shared.css b/src/browser/themes/shared/zen-browser-shared.css
index 089168a76..f7bfcfa38 100644
--- a/src/browser/themes/shared/zen-browser-shared.css
+++ b/src/browser/themes/shared/zen-browser-shared.css
@@ -887,6 +887,6 @@ panelmultiview {
 
 /* Window controls */
 
-#titlebar-buttonbox-container {
+.titlebar-buttonbox-container {
   padding-right: 10px;
 }