diff --git a/resources/skins.minerva.mainMenu.styles/mainmenu.less b/resources/skins.minerva.mainMenu.styles/mainmenu.less
index c30e74af7..948416b0a 100644
--- a/resources/skins.minerva.mainMenu.styles/mainmenu.less
+++ b/resources/skins.minerva.mainMenu.styles/mainmenu.less
@@ -22,7 +22,9 @@
 #mw-mf-page-left {
 	background-color: @primaryNavBackgroundColor;
 	float: left;
-	min-height: 100%;
+	height: 100%;
+	// Add vertical scrollbar as needed.
+	overflow-y: auto;
 
 	.secondary-action {
 		border: 0;
@@ -121,7 +123,6 @@
 		// the two following properties are needed to override the height set
 		// by position: fixed fallback on scroll event
 		min-height: 100%;
-		height: auto !important;
 	}
 
 	#mw-mf-page-center {