diff --git a/wp-content/themes/twentyeleven/style.css b/wp-content/themes/twentyeleven/style.css
index 8a39d3783..20d16f684 100644
--- a/wp-content/themes/twentyeleven/style.css
+++ b/wp-content/themes/twentyeleven/style.css
@@ -392,6 +392,7 @@ pre {
 	font: 13px "Courier 10 Pitch", Courier, monospace;
 	line-height: 1.5;
 	margin-bottom: 1.625em;
+	overflow: auto;
 	padding: 0.75em 1.625em;
 }
 code, kbd {