diff --git a/sphinx/themes/basic/static/basic.css_t b/sphinx/themes/basic/static/basic.css_t
index 5f33a9898..ae4d86cb4 100644
--- a/sphinx/themes/basic/static/basic.css_t
+++ b/sphinx/themes/basic/static/basic.css_t
@@ -327,7 +327,7 @@ p.sidebar-title {
     font-weight: bold;
 }
 
-div.admonition, div.topic, pre {
+div.admonition, div.topic, pre, div[class|="highlight"] {
     clear: both;
 }