diff --git a/mrbgems/mruby-io/mrblib/file.rb b/mrbgems/mruby-io/mrblib/file.rb
index 4a387672c..719f4e629 100644
--- a/mrbgems/mruby-io/mrblib/file.rb
+++ b/mrbgems/mruby-io/mrblib/file.rb
@@ -26,6 +26,10 @@ class File < IO
     t && Time.at(t)
   end
 
+  def inspect
+    "<#{self.class}:#{@path}>"
+  end
+
   def self.join(*names)
     return "" if names.empty?