diff --git a/configure.in b/configure.in
index 1997e8cacb..bf5a2157d6 100644
--- a/configure.in
+++ b/configure.in
@@ -866,8 +866,7 @@ test "$program_suffix" != NONE &&
 RUBY_INSTALL_NAME="${ri_prefix}ruby${ri_suffix}"
 RUBY_LIB_PREFIX="${prefix}/lib/ruby"
 RUBY_LIB_PATH="${RUBY_LIB_PREFIX}/${MAJOR}.${MINOR}"
-#sitedir='${prefix}/lib/ruby/site_ruby'
-sitedir="${prefix}/lib/ruby/site_ruby"
+sitedir='${prefix}/lib/ruby/site_ruby'
 AC_ARG_WITH(sitedir,
 	    [--with-sitedir=DIR        site libraries in DIR [PREFIX/lib/ruby/site_ruby]],
             [sitedir=$withval])