diff --git a/wp-content/themes/twentyten/style.css b/wp-content/themes/twentyten/style.css
index ee5d61d47a..a2183c9417 100644
--- a/wp-content/themes/twentyten/style.css
+++ b/wp-content/themes/twentyten/style.css
@@ -285,6 +285,7 @@ pre {
 	color: #222;
 	line-height: 18px;
 	margin-bottom: 18px;
+	overflow: auto;
 	padding: 1.5em;
 }
 abbr,