diff --git a/theme/standard/styles_layout.css b/theme/standard/styles_layout.css
index 050d804739e..82b39275113 100644
--- a/theme/standard/styles_layout.css
+++ b/theme/standard/styles_layout.css
@@ -344,7 +344,7 @@ body#admin-config .confighelp {
   border:none;
   border-top:1px solid;
 }
-.sideblock.hidden .content {
+.sideblock .hidden .content {
   display: none;
 }