diff --git a/phpBB/phpbb/console/command/thumbnail/delete.php b/phpBB/phpbb/console/command/thumbnail/delete.php
index 707c05ffea..ba6fdf7ce6 100644
--- a/phpBB/phpbb/console/command/thumbnail/delete.php
+++ b/phpBB/phpbb/console/command/thumbnail/delete.php
@@ -100,7 +100,7 @@ class delete  extends \phpbb\console\command\command
 		}
 		$this->db->sql_freeresult($result);
 
-		if (sizeof($thumbnail_deleted))
+		if (!empty($thumbnail_deleted))
 		{
 			$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
 				SET thumbnail = 0
diff --git a/phpBB/phpbb/console/command/thumbnail/generate.php b/phpBB/phpbb/console/command/thumbnail/generate.php
index bbe6677650..ac9d18d933 100644
--- a/phpBB/phpbb/console/command/thumbnail/generate.php
+++ b/phpBB/phpbb/console/command/thumbnail/generate.php
@@ -122,7 +122,7 @@ class generate extends \phpbb\console\command\command
 		}
 		$this->db->sql_freeresult($result);
 
-		if (sizeof($thumbnail_created))
+		if (!empty($thumbnail_created))
 		{
 			$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
 				SET thumbnail = 1