diff --git a/core/class.rbs b/core/class.rbs
index abfdc2164..45173cb60 100644
--- a/core/class.rbs
+++ b/core/class.rbs
@@ -149,7 +149,7 @@ class Class < Module
   #     New subclass: Bar
   #     New subclass: Baz
   #
-  def inherited: (Class arg0) -> untyped
+  def inherited: (instance arg0) -> untyped
 
   # <!--
   #   rdoc-file=object.c