diff --git a/web/index.html b/web/index.html
index f53481ca2..4a3aff266 100755
--- a/web/index.html
+++ b/web/index.html
@@ -3,6 +3,7 @@
 	<head>
 		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 		<meta http-equiv="cache-control" content="Private" />
+		<meta http-equiv="X-UA-Compatible" content="IE=7,IE=8,IE=9"><!-- ticket #4555 -->
 		<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>
 		<meta name="apple-mobile-web-app-capable" content="yes" />
 		<link href="./images/favicon.ico" rel="icon" />
