diff --git a/include/sessions.php b/include/sessions.php
index c27eb98b0..ca9f169d8 100644
--- a/include/sessions.php
+++ b/include/sessions.php
@@ -49,7 +49,7 @@
 
 		if ($_SESSION["uid"]) {
 
-			if ($_SESSION["user_agent"] != sha1($_SERVER['HTTP_USER_AGENT'])) {
+			if (!defined('_SESSION_SKIP_UA_CHECKS') && $_SESSION["user_agent"] != sha1($_SERVER['HTTP_USER_AGENT'])) {
 				$_SESSION["login_error_msg"] = __("Session failed to validate (UA changed).");
 				return false;
 			}