1 files changed, 1 insertions, 0 deletions
diff --git a/lib/open-uri.rb b/lib/open-uri.rb
index 22c27c8ccc..e601c5cf5c 100644
--- a/lib/open-uri.rb
+++ b/lib/open-uri.rb
@@ -221,6 +221,7 @@ module OpenURI
       if StringIO === @io && StringMax < @size
         require 'tempfile'
         io = Tempfile.new('open-uri')
+        io.binmode
         Meta.init io, @io if Meta === @io
         io << @io.string
         @io = io