diff --git a/vars/build.vars b/vars/build.vars
index f4ebfbf..64466f6 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -669,7 +669,7 @@ NATIVE_PACKAGES_DEPS_X11_LDFLAGS_CONFIGURE="--sysroot=${PREFIX_NATIVE}";
 NATIVE_PACKAGES_DEPS_X11_MAKEFLAGS_INSTALL="PREFIX= prefix=";
 NATIVE_PACKAGES_DEPS_X11_PACKAGES="
 util_macros xorgproto xcb_proto xtrans libpthread_stubs libXau xcb xcb_util xcb_util_image xcb_util_wm libX11 libXext freetype fontconfig
-Xrender libXft libXfixes libXi libXtst libICE libSM libXt libXmu libXpm libXaw libxkbfile libXdamage libXfont2
+Xrender libXft libXfixes libXi libXtst libICE libSM libXt libXmu libXpm libXaw libxkbfile libXdamage libXfont2 libXdmcp
 mesa glew harfbuzz libfontenc pixman cairo dbus dbus_glib sdl2 pango atk at_spi2_core at_spi2_atk gdk libepoxy
 gtk2 gtk3 imlib2 libcaca libxfce4util xfconf libxfce4ui";
 NATIVE_PACKAGES_DEPS_X11_PREFIX="${PREFIX_NATIVE}";
@@ -767,6 +767,9 @@ NATIVE_PACKAGES_DEPS_X11_PYTHON="${PREFIX}/bin/python";
 : ${PKG_LIBXFONT2_VERSION:=2.0.3};
 : ${PKG_LIBXFONT2_URL:=https://x.org/releases/individual/lib/libXfont2-${PKG_LIBXFONT2_VERSION}.tar.bz2};
 : ${PKG_LIBXFONT2_CFLAGS_CONFIGURE_EXTRA:=-I${PREFIX_NATIVE}/include/freetype2};
+: ${PKG_LIBXDMCP_SHA256SUM:=81fe09867918fff258296e1e1e159f0dc639cb30d201c53519f25ab73af4e4e2};
+: ${PKG_LIBXDMCP_VERSION:=1.1.2};
+: ${PKG_LIBXDMCP_URL:=https://x.org/releases/individual/lib/libXdmcp-${PKG_LIBXDMCP_VERSION}.tar.bz2};
 : ${PKG_MESA_SHA256SUM:=694e5c3d37717d23258c1f88bc134223c5d1aac70518d2f9134d6df3ee791eea};
 : ${PKG_MESA_VERSION:=18.0.0};
 : ${PKG_MESA_URL:=https://mesa.freedesktop.org/archive/mesa-${PKG_MESA_VERSION}.tar.xz};