diff --git a/dev-gap/ctbllib/ctbllib-1.3.9.ebuild b/dev-gap/ctbllib/ctbllib-1.3.9.ebuild
index 07eedf502da9f..95a284407227f 100644
--- a/dev-gap/ctbllib/ctbllib-1.3.9.ebuild
+++ b/dev-gap/ctbllib/ctbllib-1.3.9.ebuild
@@ -10,7 +10,7 @@ SLOT="0"
 SRC_URI="https://www.math.rwth-aachen.de/~Thomas.Breuer/${PN}/${P}.tar.gz"
 
 LICENSE="GPL-3+"
-KEYWORDS="~amd64"
+KEYWORDS="amd64"
 IUSE="test"
 RESTRICT="!test? ( test )"