diff --git a/chrome/urlbar/urlbar.css b/chrome/urlbar/urlbar.css
index 5afb41e..debdaa1 100644
--- a/chrome/urlbar/urlbar.css
+++ b/chrome/urlbar/urlbar.css
@@ -191,7 +191,7 @@
 {
 	background-color: var(--toolbar-field-hover-background-color) !important;
 	border: 1px solid var(--toolbar-field-hover-background-color) !important;
-	border-color: var(--toolbar-field-hover-border-color) !important;
+	border-color: var(--toolbar-field-hover-border-color, transparent) !important;
 	padding: 1px !important;
 }