diff --git a/browser/themes/gnomestripe/browser/browser.css b/browser/themes/gnomestripe/browser/browser.css
index 71e7389f9456..afd689132dac 100644
--- a/browser/themes/gnomestripe/browser/browser.css
+++ b/browser/themes/gnomestripe/browser/browser.css
@@ -1843,7 +1843,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   cursor: help;
   background-color: ThreeDFace;
 %ifdef MOZ_WIDGET_GTK2
-  border-right: 1px solid ThreeDShadow;
+  -moz-border-end: 1px solid red;
 %else
   -moz-appearance: toolbox;
   outline: 1px solid ThreeDShadow;