diff --git a/app-office/plan/plan-1.10.ebuild b/app-office/plan/plan-1.10.ebuild
index 642152f246610..bb35e51815619 100644
--- a/app-office/plan/plan-1.10.ebuild
+++ b/app-office/plan/plan-1.10.ebuild
@@ -1,9 +1,9 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=5
 
-inherit eutils
+inherit eutils toolchain-funcs
 
 DESCRIPTION="Motif based schedule planner"
 HOMEPAGE="https://www.bitrot.de/plan.html"