diff --git a/conf/intel/portage/package.mask/00-sabayon.package.mask b/conf/intel/portage/package.mask/00-sabayon.package.mask
index 37d349c5..55653b0a 100644
--- a/conf/intel/portage/package.mask/00-sabayon.package.mask
+++ b/conf/intel/portage/package.mask/00-sabayon.package.mask
@@ -202,10 +202,6 @@ kde-apps/kde-l10n::gentoo
 # 2016-08-06 Ettore Di Giacinto: Only use overlay version
 sys-power/cpupower::gentoo
 
-# 2016-08-23 Sławomir Nizio: conflicts with media-gfx/paint-mono-0.1.63, https://bugs.gentoo.org/show_bug.cgi?id=591556
-# forked ebuild used
-=sci-mathematics/singular-4.0.2::gentoo
-
 # 2016-08-23 Ettore Di Giacinto: use overlay version
 media-sound/mixxx::gentoo