diff --git a/conf/intel/portage/package.use/00-sabayon.package.use b/conf/intel/portage/package.use/00-sabayon.package.use
index 9eb53066..17c16217 100644
--- a/conf/intel/portage/package.use/00-sabayon.package.use
+++ b/conf/intel/portage/package.use/00-sabayon.package.use
@@ -899,6 +899,7 @@ virtual/opencl video_cards_nvidia video_cards_fglrx
 # relevant flags must be kept in sync with dev-vcs/subversion
 www-apache/mod_dav_svn -dso
 www-apache/mod_jk java
+www-apache/mod_perl ithreads
 
 www-apps/egroupware mysql
 www-apps/owncloud mysql postgres sqlite3