diff --git a/lib/zip/entry.rb b/lib/zip/entry.rb
index fddab51e..f50ea31a 100644
--- a/lib/zip/entry.rb
+++ b/lib/zip/entry.rb
@@ -1,3 +1,4 @@
+require 'pathname'
 module Zip
   class Entry
     STORED   = 0