diff --git a/rubygem-nokogiri.spec b/rubygem-nokogiri.spec
index a9da3c0..77c8178 100644
--- a/rubygem-nokogiri.spec
+++ b/rubygem-nokogiri.spec
@@ -1,3 +1,4 @@
+%global        ruby_sitelib            %(ruby -rrbconfig -e "puts Config::CONFIG['sitelibdir']")
 %global        ruby_sitearch           %(ruby -rrbconfig -e "puts Config::CONFIG['sitearchdir']")
 %global	rubyabi		1.8