diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 01d2cbec19221..1480c54ce4084 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -997,7 +997,7 @@ span.since {
 		margin-left: -15px;
 		padding: 0 15px;
 		position: static;
-		z-index: 1;
+		z-index: 11;
 	}
 
 	.sidebar > .location {