diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index cf5592da432..5c946839242 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -314,7 +314,7 @@ main {
 	position: relative;
 	flex-grow: 1;
 	padding: 10px 15px 40px 45px;
-	min-width: 0;
+	min-width: 0; /* avoid growing beyond the size limit */
 }
 
 .source main {