diff --git a/conf/intel/portage/package.unmask/00-sabayon.package.unmask b/conf/intel/portage/package.unmask/00-sabayon.package.unmask
index 35089e73..cf1a5e6f 100644
--- a/conf/intel/portage/package.unmask/00-sabayon.package.unmask
+++ b/conf/intel/portage/package.unmask/00-sabayon.package.unmask
@@ -334,6 +334,7 @@ dev-libs/libgcrypt:11
 =net-libs/libtirpc-0.2.4-r2
 =sys-libs/cracklib-2.9.1-r1
 =sys-libs/pam-1.1.8-r2
+=sys-devel/flex-2.5.39-r1
 
 # MATE 1.8 is like zomg want
 <app-admin/mate-system-tools-1.9::mate-overlay