diff --git a/src/librustdoc/html/static/main.css b/src/librustdoc/html/static/main.css
index 8d42dd15ef329..f24110a62eb1b 100644
--- a/src/librustdoc/html/static/main.css
+++ b/src/librustdoc/html/static/main.css
@@ -118,7 +118,11 @@ body {
 .content h1 { margin-top: 0; }
 .content h1, .content h2 { margin-left: -20px; }
 .content pre { padding: 20px; }
-
+.content.source pre.rust {
+    white-space: pre;
+    overflow: auto;
+    padding-left: 0;
+}
 .content pre.line-numbers { float: left; border: none; }
 .line-numbers span { color: #c67e2d; }
 .line-numbers .line-highlighted {