diff --git a/files/lib/data/command/Command.class.php b/files/lib/data/command/Command.class.php
index ac63f14..d8bd6be 100644
--- a/files/lib/data/command/Command.class.php
+++ b/files/lib/data/command/Command.class.php
@@ -35,7 +35,7 @@ class Command extends ProcessibleDatabaseObject
      *
      * The default PlainCommand implicitely has one.
      */
-    public function hasTriggers()
+    public function hasTriggers(): bool
     {
         static $chatPackageID = null;