diff --git a/LibreNMS/Validations/Rrd/CheckRrdStep.php b/LibreNMS/Validations/Rrd/CheckRrdStep.php
index 67035dd305e6a23de8095291d2012c8e537d9cd3..4ef3a8061fc8ec479dbf7aa0adb6702eb362cb01 100644
--- a/LibreNMS/Validations/Rrd/CheckRrdStep.php
+++ b/LibreNMS/Validations/Rrd/CheckRrdStep.php
@@ -85,6 +85,7 @@ class CheckRrdStep implements Validation
 
     /**
      * @return string[]
+     *
      * @throws RrdException
      */
     private function listFiles(): array