lib/kind.rb in kind-3.0.1 vs lib/kind.rb in kind-3.1.0

@@ -1,9 +1,11 @@
 # frozen_string_literal: true
 
 require 'kind/version'
 
+require 'ostruct'
+
 require 'kind/empty'
 require 'kind/undefined'
 require 'kind/checker'
 require 'kind/maybe'
 
@@ -292,10 +294,10 @@
     # ---------------------- #
 
     # -- Classes
     [
       String, Symbol, Numeric, Integer, Float, Regexp, Time,
-      Array, Range, Hash, Struct, Enumerator, Set,
+      Array, Range, Hash, Struct, Enumerator, Set, OpenStruct,
       Method, Proc,
       IO, File
     ].each { |klass| Types.add(klass) }
 
     Types.add(Queue, name: 'Queue'.freeze)