diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index 8f4ac19fb8..44857dbc41 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -11,7 +11,7 @@
 <meta name="copyright" content="2000, 2002, 2005, 2007 phpBB Group" />
 <meta name="keywords" content="" />
 <meta name="description" content="" />
-<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
+<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9" />
 {META}
 <title>{SITENAME} &bull; <!-- IF S_IN_MCP -->{L_MCP} &bull; <!-- ELSEIF S_IN_UCP -->{L_UCP} &bull; <!-- ENDIF -->{PAGE_TITLE}</title>
 
diff --git a/phpBB/styles/subsilver2/template/overall_header.html b/phpBB/styles/subsilver2/template/overall_header.html
index a8a53abd24..874beb8e2b 100644
--- a/phpBB/styles/subsilver2/template/overall_header.html
+++ b/phpBB/styles/subsilver2/template/overall_header.html
@@ -11,7 +11,7 @@
 <meta name="copyright" content="2000, 2002, 2005, 2007 phpBB Group" />
 <meta name="keywords" content="" />
 <meta name="description" content="" />
-<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
+<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9" />
 {META}
 <title>{SITENAME} &bull; <!-- IF S_IN_MCP -->{L_MCP} &bull; <!-- ELSEIF S_IN_UCP -->{L_UCP} &bull; <!-- ENDIF -->{PAGE_TITLE}</title>