diff --git a/lib/Categories/Database.php b/lib/Categories/Database.php
index 0fd76b3..a0637f4 100644
--- a/lib/Categories/Database.php
+++ b/lib/Categories/Database.php
@@ -133,7 +133,7 @@ protected function databaseSize() {
 					$database_size = filesize($this->config->getSystemValue('dbhost'));
 				} else {
 					/** @psalm-suppress UndefinedInterfaceMethod */
-					$params = $this->connection->getParams();
+					$params = $this->connection->getInner()->getParams();
 					if (file_exists($params['path'])) {
 						$database_size = filesize($params['path']);
 					}