1 files changed, 3 insertions, 2 deletions
diff --git a/lib/open-uri.rb b/lib/open-uri.rb
index 4daec25c01..b426455e27 100644
--- a/lib/open-uri.rb
+++ b/lib/open-uri.rb
@@ -778,8 +778,9 @@ module URI
       end
       require 'net/ftp'
 
-      directories = self.path.split(%r{/}, -1)
-      directories.shift if directories[0] == '' # strip a field before leading slash
+      path = self.path
+      path = path.sub(%r{\A/}, '%2F') # re-encode the beginning slash because uri library decodes it.
+      directories = path.split(%r{/}, -1)
       directories.each {|d|
         d.gsub!(/%([0-9A-Fa-f][0-9A-Fa-f])/) { [$1].pack("H2") }
       }