diff --git a/lib/zip/errors.rb b/lib/zip/errors.rb
index d67c8c8..bb15b6b 100644
--- a/lib/zip/errors.rb
+++ b/lib/zip/errors.rb
@@ -6,7 +6,6 @@ module Zip
   class DestinationFileExistsError < Error; end
   class EntryNameError < Error; end
   class EntrySizeError < Error; end
-  class InternalError < Error; end
 
   class CompressionMethodError < Error
     attr_reader :compression_method