diff --git a/theme/stylesheet.css b/theme/stylesheet.css
index 5a7cc72..6720f4c 100644
--- a/theme/stylesheet.css
+++ b/theme/stylesheet.css
@@ -94,6 +94,7 @@
 .debianforumde-sidebar {
    visibility: hidden;
 	    width: 1px;
+	    height: 1px;
 }
 
 }