diff --git a/phpBB/phpbb/db/driver/mysqli.php b/phpBB/phpbb/db/driver/mysqli.php
index 826233507f..1b7f6252f6 100644
--- a/phpBB/phpbb/db/driver/mysqli.php
+++ b/phpBB/phpbb/db/driver/mysqli.php
@@ -71,6 +71,13 @@ class mysqli extends \phpbb\db\driver\mysql_base
 			// Disable loading local files on client side
 			@mysqli_options($this->db_connect_id, MYSQLI_OPT_LOCAL_INFILE, false);
 
+			/*
+			 * As of PHP 8.1 MySQLi default error mode is set to MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT
+			 * See https://wiki.php.net/rfc/mysqli_default_errmode
+			 * Since phpBB implements own SQL errors handling, explicitly set it back to MYSQLI_REPORT_OFF
+			 */
+			mysqli_report(MYSQLI_REPORT_OFF);
+
 			@mysqli_query($this->db_connect_id, "SET NAMES 'utf8'");
 
 			// enforce strict mode on databases that support it