diff --git a/lib/debug/console.rb b/lib/debug/console.rb
index ec860b423..211af9e49 100644
--- a/lib/debug/console.rb
+++ b/lib/debug/console.rb
@@ -163,6 +163,7 @@ def history_file
         path = File.join(File.expand_path(state_dir), 'rdbg', 'history')
       end
 
+      require 'fileutils'
       FileUtils.mkdir_p(File.dirname(path)) unless File.exist?(path)
       path
     end
diff --git a/lib/debug/server.rb b/lib/debug/server.rb
index 41f3bca13..0a3c7d266 100644
--- a/lib/debug/server.rb
+++ b/lib/debug/server.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'socket'
+require 'fileutils'
 require_relative 'config'
 require_relative 'version'
 
diff --git a/test/support/test_case.rb b/test/support/test_case.rb
index 2d1d26f96..8ae965372 100644
--- a/test/support/test_case.rb
+++ b/test/support/test_case.rb
@@ -7,6 +7,7 @@
 require 'timeout'
 require 'json'
 require 'rbconfig'
+require 'fileutils'
 require_relative '../../lib/debug/client'
 
 require_relative 'assertions'