diff --git a/doc/api_assets/style.css b/doc/api_assets/style.css
index 5fb0f555929859..6faeb59efc04dd 100644
--- a/doc/api_assets/style.css
+++ b/doc/api_assets/style.css
@@ -780,7 +780,7 @@ kbd {
 }
 
 .js-flavor-selector {
-  -webkit-appearance: unset;
+  -webkit-appearance: none;
   appearance: none;
   float: right;
   background-image: url(./js-flavor-cjs.svg);