diff --git a/dev-gap/cvec/cvec-2.8.1.ebuild b/dev-gap/cvec/cvec-2.8.1-r1.ebuild
similarity index 88%
rename from dev-gap/cvec/cvec-2.8.1.ebuild
rename to dev-gap/cvec/cvec-2.8.1-r1.ebuild
index 9c1fc6df5c94a..b32983dee0298 100644
--- a/dev-gap/cvec/cvec-2.8.1.ebuild
+++ b/dev-gap/cvec/cvec-2.8.1-r1.ebuild
@@ -13,7 +13,9 @@ SLOT="0"
 KEYWORDS="~amd64"
 IUSE="examples"
 
-RDEPEND="dev-gap/io
+DEPEND="sci-mathematics/gap:="
+RDEPEND="${DEPEND}
+	dev-gap/io
 	dev-gap/orb"
 
 gap-pkg_enable_tests