diff --git a/dev-ml/calendar/calendar-2.04.ebuild b/dev-ml/calendar/calendar-2.04-r1.ebuild
similarity index 87%
rename from dev-ml/calendar/calendar-2.04.ebuild
rename to dev-ml/calendar/calendar-2.04-r1.ebuild
index d1bf98476f13f..ee9f5e2110033 100644
--- a/dev-ml/calendar/calendar-2.04.ebuild
+++ b/dev-ml/calendar/calendar-2.04-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -14,7 +14,7 @@ SLOT="0/${PV}"
 KEYWORDS="~amd64"
 IUSE="doc"
 
-DEPEND=">=dev-lang/ocaml-3.12:=[ocamlopt]"
+DEPEND="<dev-lang/ocaml-5:=[ocamlopt]"
 RDEPEND="${DEPEND}"
 
 src_compile() {