diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html
index 6df74acc9e..aef5d601d0 100644
--- a/phpBB/docs/CHANGELOG.html
+++ b/phpBB/docs/CHANGELOG.html
@@ -163,6 +163,7 @@
 		<li>[Fix] Global announcements could not be accessed on a board using Firebird as the database server. (Bug #57525)</li>
 		<li>[Fix] BBCode parser now uses the user object for all settings rather than taking some from the template object (Bug #57365)</li>
 		<li>[Fix] Ensure a database connection is available before logging general errors. (Bug #57975)</li>
+		<li>[Fix] Do not delete unrelated attachments when deleting empty forums. (Bug #57375)</li>
 		<li>[Change] Move redirect into a hidden field to avoid issues with mod_security. (Bug #54145)</li>
 		<li>[Change] Log activation through inactive users ACP. (Bug #30145)</li>
 		<li>[Change] Send time of last item instead of current time in ATOM Feeds. (Bug #53305)</li>
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index ff291fbe8a..41999bdbb0 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -913,7 +913,13 @@ function delete_attachments($mode, $ids, $resync = true)
 {
 	global $db, $config;
 
-	if (is_array($ids) && sizeof($ids))
+	// 0 is as bad as an empty array
+	if (empty($ids))
+	{
+		return false;
+	}
+
+	if (is_array($ids))
 	{
 		$ids = array_unique($ids);
 		$ids = array_map('intval', $ids);
@@ -923,11 +929,6 @@ function delete_attachments($mode, $ids, $resync = true)
 		$ids = array((int) $ids);
 	}
 
-	if (!sizeof($ids))
-	{
-		return false;
-	}
-
 	$sql_where = '';
 
 	switch ($mode)