diff --git a/src/world/format/io/WorldProviderManager.php b/src/world/format/io/WorldProviderManager.php
index ddc92cde43..cd25847498 100644
--- a/src/world/format/io/WorldProviderManager.php
+++ b/src/world/format/io/WorldProviderManager.php
@@ -47,7 +47,7 @@ abstract class WorldProviderManager{
 	/**
 	 * Returns the default format used to generate new worlds.
 	 *
-	 * @return string|WritableWorldProvider
+	 * @return string
 	 */
 	public static function getDefault() : string{
 		return self::$default;