diff --git a/_tools/ruby_h_to_go/lib/ruby_h_to_go.rb b/_tools/ruby_h_to_go/lib/ruby_h_to_go.rb
index ad7b6bb8..a0099df7 100644
--- a/_tools/ruby_h_to_go/lib/ruby_h_to_go.rb
+++ b/_tools/ruby_h_to_go/lib/ruby_h_to_go.rb
@@ -3,15 +3,17 @@
 require "forwardable"
 require "ruby_header_parser"
 
+require_relative "ruby_h_to_go/type_helper"
+
+require_relative "ruby_h_to_go/argument_definition"
+require_relative "ruby_h_to_go/cli"
+require_relative "ruby_h_to_go/go_util"
+require_relative "ruby_h_to_go/enum_definition"
+require_relative "ruby_h_to_go/function_definition"
+require_relative "ruby_h_to_go/struct_definition"
+require_relative "ruby_h_to_go/type_definition"
+require_relative "ruby_h_to_go/typeref_definition"
+
 # Generate Go binding from ruby.h
 module RubyHToGo
-  autoload :ArgumentDefinition, "ruby_h_to_go/argument_definition"
-  autoload :Cli,                "ruby_h_to_go/cli"
-  autoload :GoUtil,             "ruby_h_to_go/go_util"
-  autoload :EnumDefinition,     "ruby_h_to_go/enum_definition"
-  autoload :FunctionDefinition, "ruby_h_to_go/function_definition"
-  autoload :StructDefinition,   "ruby_h_to_go/struct_definition"
-  autoload :TypeDefinition,     "ruby_h_to_go/type_definition"
-  autoload :TypeHelper,         "ruby_h_to_go/type_helper"
-  autoload :TyperefDefinition,  "ruby_h_to_go/typeref_definition"
 end