diff --git a/modules/ext.RevisionSlider.less b/modules/ext.RevisionSlider.less
index 87150bbb..ad0f409c 100644
--- a/modules/ext.RevisionSlider.less
+++ b/modules/ext.RevisionSlider.less
@@ -20,10 +20,6 @@
 	right: 2.109375em;
 }
 
-.mw-revslider-button-active {
-	background-color: #999;
-}
-
 .mw-revslider-revision {
 	position: relative;
 	margin-top: 70px;