diff --git a/inc/config.php b/inc/config.php
index 25031bfb..6d00eb72 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -902,10 +902,6 @@
     // -auto-orrient is applied when thumbnailing too.
     $config['convert_manual_orient'] = false;
 
-    // Regular expression to check for an XSS exploit with IE 6 and 7. To disable, set to false.
-    // Details: https://github.com/savetheinternet/Tinyboard/issues/20
-    $config['ie_mime_type_detection'] = '/<(?:body|head|html|img|plaintext|pre|script|table|title|a href|channel|scriptlet)/i';
-
     // Allowed image file extensions.
     $config['allowed_ext'][] = 'jpg';
     $config['allowed_ext'][] = 'jpeg';