diff --git a/browser/themes/windows/browser.css b/browser/themes/windows/browser.css
index 3e75a5f366e76acf4b9457a510b58b0cb8af580f..4962151f34ff52e8d009b82a9a12da99c4745a7a 100644
--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -57,7 +57,7 @@
       }
     }
 
-    &[sizemode="normal"] #navigator-toolbox {
+    &[sizemode="normal"] #browser {
       border-top: .5px solid ActiveBorder;
       &:-moz-window-inactive {
         border-top-color: InactiveBorder;