diff --git a/Account/PermissionAbstract.php b/Account/PermissionAbstract.php
index 852fdd5ee..cd376fee4 100644
--- a/Account/PermissionAbstract.php
+++ b/Account/PermissionAbstract.php
@@ -406,7 +406,7 @@ class PermissionAbstract implements \JsonSerializable
         int $type = null,
         int $element = null,
         int $component = null
-    ) {
+    ) : bool {
         return $permission === PermissionType::NONE ||
             (($unit === null || $this->unit === null || $this->unit === $unit)
             && ($app === null || $this->app === null || $this->app === $app)