diff --git a/mrblib/00class.rb b/mrblib/00class.rb
index 5c0a3f3a4..57e657ac5 100644
--- a/mrblib/00class.rb
+++ b/mrblib/00class.rb
@@ -12,17 +12,6 @@ class Module
   # 15.2.2.4.11
   alias attr attr_reader
 
-  # 15.2.2.4.27
-  def include(*args)
-    args.reverse!
-    mod = self
-    args.each do |m|
-      m.__send__(:append_features, mod)
-      m.__send__(:included, mod)
-    end
-    self
-  end
-
   def prepend(*args)
     args.reverse!
     mod = self
diff --git a/src/class.c b/src/class.c
index cc13a9ef3..bc60ef509 100644
--- a/src/class.c
+++ b/src/class.c
@@ -1597,13 +1597,22 @@ mrb_mod_prepend_features(mrb_state *mrb, mrb_value mod)
 }
 
 static mrb_value
-mrb_mod_append_features(mrb_state *mrb, mrb_value mod)
+mrb_mod_include(mrb_state *mrb, mrb_value mod)
 {
-  struct RClass *c;
+  struct RClass *c = mrb_class_ptr(mod);
+  mrb_int argc;
+  mrb_value *argv;
+  mrb_sym included = MRB_SYM(included);
 
-  mrb_check_type(mrb, mod, MRB_TT_MODULE);
-  mrb_get_args(mrb, "c", &c);
-  mrb_include_module(mrb, c, mrb_class_ptr(mod));
+  mrb_get_args(mrb, "*", &argv, &argc);
+  while (argc--) {
+    mrb_value m = argv[argc];
+    mrb_check_type(mrb, m, MRB_TT_MODULE);
+    mrb_include_module(mrb, c, mrb_class_ptr(m));
+    if (!mrb_func_basic_p(mrb, m, included, mrb_do_nothing)) {
+      mrb_funcall_argv(mrb, m, included, 1, &mod);
+    }
+  }
   return mod;
 }
 
@@ -3160,7 +3169,8 @@ mrb_init_class(mrb_state *mrb)
   mrb_define_private_method_id(mrb, mod, MRB_SYM(extended),                mrb_do_nothing,           MRB_ARGS_REQ(1)); /* 15.2.2.4.26 */
   mrb_define_private_method_id(mrb, mod, MRB_SYM(prepended),               mrb_do_nothing,           MRB_ARGS_REQ(1));
   mrb_define_method_id(mrb, mod, MRB_SYM_Q(include),                       mrb_mod_include_p,        MRB_ARGS_REQ(1)); /* 15.2.2.4.28 */
-  mrb_define_private_method_id(mrb, mod, MRB_SYM(append_features),         mrb_mod_append_features,  MRB_ARGS_REQ(1)); /* 15.2.2.4.10 */
+
+  mrb_define_method_id(mrb, mod, MRB_SYM(include),                         mrb_mod_include,          MRB_ARGS_REQ(1)); /* 15.2.2.4.27 */
   mrb_define_private_method_id(mrb, mod, MRB_SYM(prepend_features),        mrb_mod_prepend_features, MRB_ARGS_REQ(1));
   mrb_define_method_id(mrb, mod, MRB_SYM(class_eval),                      mrb_mod_module_eval,      MRB_ARGS_ANY());  /* 15.2.2.4.15 */
   mrb_define_private_method_id(mrb, mod, MRB_SYM(included),                mrb_do_nothing,           MRB_ARGS_REQ(1)); /* 15.2.2.4.29 */
@@ -3192,7 +3202,6 @@ mrb_init_class(mrb_state *mrb)
   mrb_define_private_method_id(mrb, mod, MRB_SYM(method_undefined),        mrb_do_nothing,           MRB_ARGS_REQ(1));
   mrb_define_private_method_id(mrb, mod, MRB_SYM(const_added),             mrb_do_nothing,           MRB_ARGS_REQ(1));
 
-  mrb_undef_method_id(mrb, cls, MRB_SYM(append_features));
   mrb_undef_method_id(mrb, cls, MRB_SYM(prepend_features));
   mrb_undef_method_id(mrb, cls, MRB_SYM(extend_object));
   mrb_undef_method_id(mrb, cls, MRB_SYM(module_function));
diff --git a/test/t/module.rb b/test/t/module.rb
index 7ec723a2d..162784559 100644
--- a/test/t/module.rb
+++ b/test/t/module.rb
@@ -56,20 +56,6 @@ assert('Module#ancestors', '15.2.2.4.9') do
   assert_true r.include?(Object)
 end
 
-assert('Module#append_features', '15.2.2.4.10') do
-  module Test4AppendFeatures
-    def self.append_features(mod)
-      Test4AppendFeatures2.const_set(:Const4AppendFeatures2, mod)
-    end
-  end
-  module Test4AppendFeatures2
-    include Test4AppendFeatures
-  end
-
-  assert_equal Test4AppendFeatures2, Test4AppendFeatures2.const_get(:Const4AppendFeatures2)
-  assert_raise(FrozenError) { Module.new.__send__(:append_features,Class.new.freeze) }
-end
-
 assert('Module#attr NameError') do
   %w[
     foo?