diff --git a/browserid/static/dialog/css/m.css b/browserid/static/dialog/css/m.css
index bbbebe5b210f72e9fe998b810759a979b7e58284..d81b075f785d1bb9ec3cc242de90c2fbe9aa51d6 100644
--- a/browserid/static/dialog/css/m.css
+++ b/browserid/static/dialog/css/m.css
@@ -55,7 +55,7 @@ body #signIn form {
 
 body #favicon {
     border-bottom: 1px solid rgba(0,0,0,0.05);
-    background-color: rgba(255,255,255,0.25);
+    background-image: url('/i/bg.png');
     text-align: center;
     left: 0;
 }