diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index d4b9fbab801a..515d728c1744 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -1192,5 +1192,6 @@ kbd {
 
 .hidden-by-impl-hider,
 .hidden-by-usual-hider {
-	display: none;
+	/* important because of conflicting rule for small screens */
+	display: none !important;
 }