diff --git a/dev-ml/mmap/mmap-1.2.0.ebuild b/dev-ml/mmap/mmap-1.2.0-r1.ebuild
similarity index 87%
rename from dev-ml/mmap/mmap-1.2.0.ebuild
rename to dev-ml/mmap/mmap-1.2.0-r1.ebuild
index 00cf777c2393b..af5d857bc39e6 100644
--- a/dev-ml/mmap/mmap-1.2.0.ebuild
+++ b/dev-ml/mmap/mmap-1.2.0-r1.ebuild
@@ -14,3 +14,6 @@ LICENSE="LGPL-2.1"
 SLOT="0/${PV}"
 KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86"
 IUSE="+ocamlopt"
+
+RDEPEND="dev-ml/bigarray-compat:="
+DEPEND="${RDEPEND}"