diff --git a/sci-libs/orocos_kdl/orocos_kdl-1.4.0.ebuild b/sci-libs/orocos_kdl/orocos_kdl-1.4.0.ebuild
index 7ea47c627d77a..aa74627a9e438 100644
--- a/sci-libs/orocos_kdl/orocos_kdl-1.4.0.ebuild
+++ b/sci-libs/orocos_kdl/orocos_kdl-1.4.0.ebuild
@@ -22,7 +22,7 @@ fi
 DESCRIPTION="Kinematics and Dynamics Library (KDL)"
 HOMEPAGE="http://www.orocos.org/kdl"
 LICENSE="LGPL-2.1"
-SLOT="0"
+SLOT="0/14"
 IUSE="doc test examples models"
 
 RDEPEND="dev-cpp/eigen:3"
diff --git a/sci-libs/orocos_kdl/orocos_kdl-9999.ebuild b/sci-libs/orocos_kdl/orocos_kdl-9999.ebuild
index e2fe4f9b4756f..aa74627a9e438 100644
--- a/sci-libs/orocos_kdl/orocos_kdl-9999.ebuild
+++ b/sci-libs/orocos_kdl/orocos_kdl-9999.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=5
@@ -22,7 +22,7 @@ fi
 DESCRIPTION="Kinematics and Dynamics Library (KDL)"
 HOMEPAGE="http://www.orocos.org/kdl"
 LICENSE="LGPL-2.1"
-SLOT="0"
+SLOT="0/14"
 IUSE="doc test examples models"
 
 RDEPEND="dev-cpp/eigen:3"