diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index ae097de6..fcfaa8fa 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -285,7 +285,7 @@ function queries_redirect($location, $message, $redirect) {
 */
 function remove_from_uri($param = "") {
 	$param = "($param|" . session_name() . ")";
-	return substr(preg_replace("~([?&])$param=[^&]*&~", '\\1', "$_SERVER[REQUEST_URI]&"), 0, -1);
+	return substr(preg_replace("~(?<=[?&])$param=[^&]*&~", '', "$_SERVER[REQUEST_URI]&"), 0, -1);
 }
 
 /** Generate page number for pagination