diff --git a/phpBB/includes/request/request.php b/phpBB/includes/request/request.php
index ae3c526d89..c0bb453c7c 100644
--- a/phpBB/includes/request/request.php
+++ b/phpBB/includes/request/request.php
@@ -79,7 +79,7 @@ class phpbb_request implements phpbb_request_interface
 
 		// simulate request_order = GP
 		$this->original_request = $this->input[phpbb_request_interface::REQUEST];
-		$this->input[phpbb_request_interface::REQUEST] = $this->input[phpbb_request_interface::POST] + $this->input[phpbb_request_interface::GET];
+		$this->input[phpbb_request_interface::REQUEST] = (array)$this->input[phpbb_request_interface::POST] + (array)$this->input[phpbb_request_interface::GET];
 
 		if ($disable_super_globals)
 		{