diff --git a/src/Interface/BadgeableInterface.php b/src/Interface/BadgeableInterface.php
index b4824c8..271add9 100644
--- a/src/Interface/BadgeableInterface.php
+++ b/src/Interface/BadgeableInterface.php
@@ -21,8 +21,8 @@ interface BadgeableInterface
     /**
      * Get the badge icon name
      *
-     * @return ?string Icon name
+     * @return ?string Icon name or `null` if no icon exists.
      */
-    public function getBadgeIcon(): string;
+    public function getBadgeIcon(): ?string;
 }