diff --git a/lib/settings-screen.css b/lib/settings-screen.css
index fa607fc..60679ff 100644
--- a/lib/settings-screen.css
+++ b/lib/settings-screen.css
@@ -19,7 +19,7 @@ table, caption, tbody, tfoot, thead, tr, th, td {
 body {overflow: hidden;
 	-webkit-user-select: none;
 	-moz-user-select: none;
-	-o-user-select:none;
+	-ms-user-select:none;
 	user-select: none;
 	font-size: 12px;
 }