diff --git a/dev-libs/libebml/libebml-1.4.2.ebuild b/dev-libs/libebml/libebml-1.4.2.ebuild
index 777b6e12b31f5..dd87bd442f635 100644
--- a/dev-libs/libebml/libebml-1.4.2.ebuild
+++ b/dev-libs/libebml/libebml-1.4.2.ebuild
@@ -1,8 +1,12 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
 
+if [[ ${PV} != 1.4.2 ]] ; then
+	die "Do not bump to 1.4.3! It breaks ABI: https://github.com/Matroska-Org/libebml/issues/104"
+fi
+
 inherit cmake
 
 DESCRIPTION="Extensible binary format library (kinda like XML)"