diff --git a/dev-cpp/glibmm/glibmm-2.66.2.recipe b/dev-cpp/glibmm/glibmm-2.66.2.recipe
index 28e47e63a..569240779 100644
--- a/dev-cpp/glibmm/glibmm-2.66.2.recipe
+++ b/dev-cpp/glibmm/glibmm-2.66.2.recipe
@@ -4,7 +4,7 @@ HOMEPAGE="https://www.gtkmm.org/en/"
 COPYRIGHT="2021 The gtkmm Development Team"
 LICENSE="GNU LGPL v2.1
 	GNU GPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="http://ftp.gnome.org/pub/GNOME/sources/glibmm/${portVersion%.*}/glibmm-$portVersion.tar.xz"
 CHECKSUM_SHA256="b2a4cd7b9ae987794cbb5a1becc10cecb65182b9bb841868625d6bbb123edb1d"
 
@@ -96,9 +96,9 @@ INSTALL()
 
 	fixPkgconfig
 
-	sed -i -e 's|-I${libdir}/glibmm-$apiVers/include||' \
+	sed -i -e 's|-I${libdir}/glibmm-2.4/include||' \
 		$developLibDir/pkgconfig/glibmm-$apiVers.pc
-	sed -i -e 's|-I${libdir}/giomm-$apiVers/include||' \
+	sed -i -e 's|-I${libdir}/giomm-2.4/include||' \
 		$developLibDir/pkgconfig/giomm-$apiVers.pc
 
 	# devel package
diff --git a/dev-cpp/glibmm/glibmm268-2.78.0.recipe b/dev-cpp/glibmm/glibmm268-2.78.0.recipe
new file mode 100644
index 000000000..6ce93ef81
--- /dev/null
+++ b/dev-cpp/glibmm/glibmm268-2.78.0.recipe
@@ -0,0 +1,107 @@
+SUMMARY="C++ interface for glib2"
+DESCRIPTION="A C++ API for parts of glib that are useful for C++."
+HOMEPAGE="https://www.gtkmm.org/en/"
+COPYRIGHT="2023 The gtkmm Development Team"
+LICENSE="GNU LGPL v2.1
+	GNU GPL v2"
+REVISION="1"
+SOURCE_URI="http://ftp.gnome.org/pub/GNOME/sources/glibmm/${portVersion%.*}/glibmm-$portVersion.tar.xz"
+SOURCE_DIR="glibmm-$portVersion"
+CHECKSUM_SHA256="5d2e872564996f02a06d8bbac3677e7c394af8b00dd1526aebd47af842a3ef50"
+
+ARCHITECTURES="all !x86_gcc2 ?x86"
+SECONDARY_ARCHITECTURES="x86"
+
+libVersion="1.3.0"
+libVersionCompat="$libVersion compat >= ${libVersion%%.*}"
+apiVers="2.68"
+
+PROVIDES="
+	glibmm268$secondaryArchSuffix = $portVersion
+	lib:libgiomm_$apiVers$secondaryArchSuffix = $libVersionCompat
+	lib:libglibmm_$apiVers$secondaryArchSuffix = $libVersionCompat
+	lib:libglibmm_generate_extra_defs_$apiVers$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libglib_2.0$secondaryArchSuffix
+	lib:libgmodule_2.0$secondaryArchSuffix
+	lib:libgobject_2.0$secondaryArchSuffix
+	lib:libintl$secondaryArchSuffix
+	lib:libsigc_3.0$secondaryArchSuffix
+	"
+
+PROVIDES_devel="
+	glibmm268${secondaryArchSuffix}_devel = $portVersion
+	devel:libgiomm_$apiVers$secondaryArchSuffix = $libVersionCompat
+	devel:libglibmm_$apiVers$secondaryArchSuffix = $libVersionCompat
+	devel:libglibmm_generate_extra_defs_$apiVers$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES_devel="
+	glibmm268$secondaryArchSuffix == $portVersion base
+	devel:libsigc_3.0$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	devel:libglib_2.0$secondaryArchSuffix
+	devel:libgmodule_2.0$secondaryArchSuffix
+	devel:libgobject_2.0$secondaryArchSuffix
+	devel:libintl$secondaryArchSuffix
+	devel:libsigc_3.0$secondaryArchSuffix
+	"
+BUILD_PREREQUIRES="
+	cmd:cmake
+	cmd:gcc$secondaryArchSuffix
+	cmd:meson
+	cmd:ninja
+	cmd:pkg_config$secondaryArchSuffix
+	"
+
+defineDebugInfoPackage glibmm268$secondaryArchSuffix \
+	"$libDir"/libgiomm-$apiVers.so.$libVersion \
+	"$libDir"/libglibmm-$apiVers.so.$libVersion \
+	"$libDir"/libglibmm_generate_extra_defs-$apiVers.so.$libVersion
+
+BUILD()
+{
+	CFLAGS="-D_BSD_SOURCE" \
+		LDFLAGS="-lbsd -lgnu -lnetwork" meson build \
+		--prefix=$prefix --includedir=$includeDir \
+		--libdir=$libDir --datadir=$dataDir --bindir=$binDir \
+		-Dmaintainer-mode=false --buildtype=debugoptimized
+
+	ninja $jobArgs -C build
+}
+
+INSTALL()
+{
+	ninja -C build install
+
+	rm -rf $libDir/*.la
+
+	mv $libDir/glibmm-$apiVers/include/*.h $includeDir/glibmm-$apiVers
+	mv $libDir/giomm-$apiVers/include/*.h $includeDir/giomm-$apiVers
+	rm -rf $libDir/{glibmm-$apiVers,giomm-$apiVers}
+
+	prepareInstalledDevelLibs \
+		libgiomm-$apiVers \
+		libglibmm-$apiVers \
+		libglibmm_generate_extra_defs-$apiVers
+
+	fixPkgconfig
+
+	sed -i -e 's|-I${libdir}/glibmm-2.68/include||' \
+		$developLibDir/pkgconfig/glibmm-$apiVers.pc
+	sed -i -e 's|-I${libdir}/giomm-2.68/include||' \
+		$developLibDir/pkgconfig/giomm-$apiVers.pc
+
+	# devel package
+	packageEntries devel \
+		$developDir
+}
+
+TEST()
+{
+	ninja -C build test
+}