diff --git a/dev-cpp/muParserX/Manifest b/dev-cpp/muParserX/Manifest
index 815473a36ead4..601fb009cea90 100644
--- a/dev-cpp/muParserX/Manifest
+++ b/dev-cpp/muParserX/Manifest
@@ -1 +1,2 @@
 DIST muParserX-4.0.11.tar.gz 215824 BLAKE2B f077fee44d4b67b02a0c559ce492b27107b0f5294eca7266e968c852e1e2503a4f5fc4d32b07e5c6ebca8ab95d7f30cdacd257439f70a7943c5ad22d111139c9 SHA512 67846a91b57e41731a656cfee68effdd9166e738108764be5d3080854d8a01bedbeacaaade7bee11c6b5f83019abddeca3b2c9acdfbb48629da6d9b92c79c7af
+DIST muParserX-4.0.12.tar.gz 223342 BLAKE2B 63a5545a53ec1903b9315376edf6d01a455477994e36943fe1eb059f252f440db2e489aa1f32d34d3cff570817f48319fc914585504fbbf71f943d50ef5f9475 SHA512 5be7d846105c2eae7f9a7929147ff6890496ca80348c1b08c62fdf199a6b33d48225c4aeec00e03283e233c91574943b60ee4282169715f5ded8aa18fd9a732d
diff --git a/dev-cpp/muParserX/muParserX-4.0.12.ebuild b/dev-cpp/muParserX/muParserX-4.0.12.ebuild
new file mode 100644
index 0000000000000..78bc6694c425d
--- /dev/null
+++ b/dev-cpp/muParserX/muParserX-4.0.12.ebuild
@@ -0,0 +1,24 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="Parsing Expressions with Strings, Complex Numbers, Vectors, Matrices and more"
+HOMEPAGE="https://beltoforion.de/en/muparser/"
+SRC_URI="https://github.com/beltoforion/muparserx/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+S="${WORKDIR}"/muparserx-${PV}
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64"
+
+src_configure() {
+	# TODO: -DUSE_WIDE_STRING?
+	local mycmakeargs=(
+		-DBUILD_EXAMPLES=OFF
+	)
+
+	cmake_src_configure
+}