diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 38709b445efae..850a4b3cbc216 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -1511,6 +1511,11 @@ h4 > .important-traits {
 	#main > .line-numbers {
 		margin-top: 0;
 	}
+
+	.important-traits .important-traits-tooltiptext {
+		left: 0;
+		top: 100%;
+	}
 }
 
 @media print {