diff --git a/sci-libs/kissfft/Manifest b/sci-libs/kissfft/Manifest
index 12e96cdb00eb..26d7997008ec 100644
--- a/sci-libs/kissfft/Manifest
+++ b/sci-libs/kissfft/Manifest
@@ -1 +1,2 @@
 DIST kissfft-131.1.0.tar.gz 52383 BLAKE2B 74e6d2e7d132a311b31c28a468e13d9772a53f0ea0abed0e0f49d8db9c183fb0646f58fd38df3e797b8577285899daf6b80446b149ce2582bb828410656d96df SHA512 bd715868ce0e93a291a0592fb1f8b960e832fc64efe863755e52b67d5addff9bcb444a1bf2570d1914c52b41dad1023d0d86400f5ea30c9fb84cd6b4f7210708
+DIST kissfft-131.2.0.tar.gz 52477 BLAKE2B 79c4f98ce09dfad13ac0b440422a6a0905a4fa9c7d7234bdab79cacf6ab3f28c034f136587fae72eccb27c7369c486dcc7a95b279d76584d6a7ea0ddc24de0d8 SHA512 5d02802a9e191e7cb77c26e9a34659a5d47c4e85bcfdf86a7cffdda66d8b79261f7fe5795ffabd78644b6094c01b32a84841669fbc0009ac9268ae1ba521af9e
diff --git a/sci-libs/kissfft/files/kissfft-131.2.0-fix_python.patch b/sci-libs/kissfft/files/kissfft-131.2.0-fix_python.patch
new file mode 100644
index 000000000000..44f5bf8ad0fa
--- /dev/null
+++ b/sci-libs/kissfft/files/kissfft-131.2.0-fix_python.patch
@@ -0,0 +1,15 @@
+backport PR merged to fix python detection
+https://github.com/mborgerding/kissfft/pull/119.patch
+--- a/test/CMakeLists.txt
++++ b/test/CMakeLists.txt
+@@ -53,8 +53,8 @@ if(KISSFFT_DATATYPE MATCHES "^simd$")
+     endif()
+ endif()
+ 
+-find_package(Python REQUIRED)
+-add_test(NAME testkiss.py COMMAND "${PYTHON_EXECUTABLE}" "${CMAKE_CURRENT_SOURCE_DIR}/testkiss.py")
++find_package(Python3 COMPONENTS Interpreter REQUIRED)
++add_test(NAME testkiss.py COMMAND "${Python3_INTERPRETER}" "${CMAKE_CURRENT_SOURCE_DIR}/testkiss.py")
+ list(APPEND TESTKISS_PY_ENV "KISSFFT_DATATYPE=${KISSFFT_DATATYPE}")
+ list(APPEND TESTKISS_PY_ENV "KISSFFT_OPENMP=${KISSFFT_OPENMP}")
+ set_tests_properties(testkiss.py PROPERTIES
diff --git a/sci-libs/kissfft/kissfft-131.2.0.ebuild b/sci-libs/kissfft/kissfft-131.2.0.ebuild
new file mode 100644
index 000000000000..3e3fe3b61b3d
--- /dev/null
+++ b/sci-libs/kissfft/kissfft-131.2.0.ebuild
@@ -0,0 +1,92 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit cmake multibuild python-any-r1 toolchain-funcs
+
+DESCRIPTION="Fast Fourier Transform (FFT) library that tries to Keep it Simple, Stupid"
+HOMEPAGE="https://github.com/mborgerding/kissfft"
+
+if [[ ${PV} == *9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/mborgerding/kissfft"
+	inherit git-r3
+else
+	SRC_URI="https://github.com/mborgerding/kissfft/archive/${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~arm ~arm64 ~riscv ~x86"
+fi
+
+LICENSE="BSD"
+SLOT="0"
+IUSE="alloca cpu_flags_x86_sse double int16 int32 openmp test tools"
+RESTRICT="!test? ( test )"
+
+RDEPEND="tools? ( media-libs/libpng:= )"
+DEPEND="
+	${RDEPEND}
+	test? (
+		sci-libs/fftw:3.0
+		$(python_gen_any_dep '
+			dev-python/numpy[${PYTHON_USEDEP}]
+		')
+	)
+"
+
+PATCHES=(
+	# both merged after 131.2.0
+	"${FILESDIR}"/${PN}-131.1.0-cross.patch
+	"${FILESDIR}"/${PN}-131.2.0-fix_python.patch
+	# PR pending https://github.com/mborgerding/kissfft/pull/92
+	"${FILESDIR}"/${PN}-131.1.0-cmake.patch
+)
+
+python_check_deps() {
+	python_has_version -d "dev-python/numpy[${PYTHON_USEDEP}]"
+}
+
+pkg_pretend() {
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+pkg_setup() {
+	MULTIBUILD_VARIANTS=(
+		float
+		$(usev double)
+		$(usev int16 int16_t)
+		$(usev int32 int32_t)
+		$(usev cpu_flags_x86_sse simd)
+	)
+
+	use test && python-any-r1_pkg_setup
+	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
+}
+
+kissfft_configure() {
+	local mycmakeargs=(
+		-DKISSFFT_OPENMP=$(usex openmp 1 0)
+		-DKISSFFT_TEST=$(usex test)
+		-DKISSFFT_TOOLS=$(usex tools)
+		-DKISSFFT_USE_ALLOCA=$(usex alloca)
+		-DKISSFFT_DATATYPE=${MULTIBUILD_VARIANT}
+	)
+
+	cmake_src_configure
+}
+
+src_configure() {
+	multibuild_foreach_variant kissfft_configure
+}
+
+src_compile() {
+	multibuild_foreach_variant cmake_src_compile
+}
+
+src_test() {
+	multibuild_foreach_variant cmake_src_test
+}
+
+src_install() {
+	multibuild_foreach_variant cmake_src_install
+}