diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index ad7ef9b453cec..486ca9b22539c 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -20,6 +20,7 @@
--src-sidebar-width: 300px;
--desktop-sidebar-z-index: 100;
--sidebar-elems-left-padding: 24px;
+ --popover-top-margin: 7px;
/* clipboard */
--clipboard-image: url('data:image/svg+xml,