diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 37d26a4cadc57..cd5a8a739d16d 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -641,7 +641,7 @@ a {
 	text-overflow: "";
 	background-repeat: no-repeat;
 	background-color: transparent;
-	background-size: 16%;
+	background-size: 20px;
 	background-position: calc(100% - 1px) 56%;
 }
 .search-container > .top-button {