diff --git a/chrome/content/vimperator/default.css b/chrome/content/vimperator/default.css
index b3144c01..6e8f6e6c 100644
--- a/chrome/content/vimperator/default.css
+++ b/chrome/content/vimperator/default.css
@@ -166,6 +166,7 @@ fieldset.paypal {
 }
 
 #vimperator-visualbell {
+    border: none;
     background-color: blue;
     opacity: 0.5;
 }