--- a/lib/msgpack.rb
+++ b/lib/msgpack.rb
@@ -6,5 +6,5 @@
   ver = '1.9' if ver == '2.0'
   require File.join(here, 'msgpack', ver, 'msgpack')
 rescue LoadError
-  require File.join(here, 'msgpack', 'msgpack')
+  require File.join('msgpack', 'msgpack.so')
 end
