diff --git a/phpBB/includes/acp/acp_database.php b/phpBB/includes/acp/acp_database.php
index 0404ec73b7..2acbfb63ec 100644
--- a/phpBB/includes/acp/acp_database.php
+++ b/phpBB/includes/acp/acp_database.php
@@ -552,7 +552,7 @@ class base_extractor
 				break;
 
 				case 'gzip':
-					if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)
+					if ((isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false) && strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'msie') === false)
 					{
 						ob_start('ob_gzhandler');
 					}