diff --git a/phpBB/phpbb/db/migration/data/v400/add_audio_files_attachment_group.php b/phpBB/phpbb/db/migration/data/v400/add_audio_files_attachment_group.php
new file mode 100644
index 0000000000..6fe61f94e6
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v400/add_audio_files_attachment_group.php
@@ -0,0 +1,86 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\migration\data\v400;
+
+class add_audio_files_attachment_group extends \phpbb\db\migration\migration
+{
+	static public function depends_on()
+	{
+		return ['\phpbb\db\migration\data\v400\dev'];
+	}
+
+	public function update_data()
+	{
+		return [
+			['custom', [[$this, 'add_audio_files_attachment_group']]],
+		];
+	}
+
+	public function add_audio_files_attachment_group()
+	{
+		$sql = 'SELECT group_id 
+			FROM ' . $this->table_prefix . 'extension_groups
+			WHERE ' . $this->db->sql_build_array('SELECT', ['group_name' => 'AUDIO_FILES']);
+		$result = $this->db->sql_query($sql);
+		$audio_group_id = $this->db->sql_fetchfield('group_id');
+		$this->db->sql_freeresult($result);
+
+		if ($audio_group_id === false)
+		{
+			$sql = 'INSERT INTO ' . $this->table_prefix . 'extension_groups ' . $this->db->sql_build_array('INSERT', [
+				'group_name'		=> 'AUDIO_FILES',
+				'cat_id'			=> 7,
+				'allow_group'		=> 0,
+				'upload_icon'		=> '',
+				'max_filesize'		=> 0,
+				'allowed_forums'	=> '',
+			]);
+			$this->db->sql_query($sql);
+			$audio_group_id = $this->db->sql_nextid();
+		} 
+		else 
+		{
+			$sql = 'UPDATE ' . $this->table_prefix . 'extension_groups SET cat_id = 7
+				WHERE ' . $this->db->sql_build_array('SELECT', ['group_id' => $audio_group_id]);
+			$this->db->sql_query($sql);
+		}
+
+		$audio_extensions = ['mp3', 'wav', 'm4a', 'ogg', 'webm'];
+
+		foreach($audio_extensions as $audio_extension)
+		{
+			$sql = 'SELECT group_id
+				FROM ' . $this->table_prefix . 'extensions
+				WHERE ' . $this->db->sql_build_array('SELECT', ['extension' => $audio_extension]);
+			$result = $this->db->sql_query($sql);
+			$extension_group_id = $this->db->sql_fetchfield('group_id');
+			$this->db->sql_freeresult($result);
+
+			if ($extension_group_id === false)
+			{
+				$sql = 'INSERT INTO ' . $this->table_prefix . 'extensions ' . $this->db->sql_build_array('INSERT', [
+					'group_id'	=> $audio_group_id,
+					'extension'	=> $audio_extension,
+				]);
+				$this->db->sql_query($sql);
+			} 
+			else if ($extension_group_id != $audio_group_id)
+			{
+				$sql = 'UPDATE ' . $this->table_prefix . "extensions SET group_id = $audio_group_id 
+					WHERE " . $this->db->sql_build_array('SELECT', ['extension' => $audio_extension]);
+				$this->db->sql_query($sql);
+			}
+		}
+	}
+}