diff --git a/groups/251.native_packages_lib.group b/groups/251.native_packages_lib.group
index 06dbcbd..aafc300 100644
--- a/groups/251.native_packages_lib.group
+++ b/groups/251.native_packages_lib.group
@@ -3,7 +3,7 @@
 #
 GROUP_TARGET="native_packages";
 NATIVE_PACKAGES_PACKAGES="$(rtl_lconcat "${NATIVE_PACKAGES_PACKAGES}" "
-glib lame libarchive libassuan libatomic_ops libdmtx libedit libeditline libelf
+glib lame libarchive libassuan libatomic_ops libdmtx libedit libeditline libelf libestr
 libevent libfetch libffi libfirm libflac libgcrypt libgpg_error
 libjpeg_turbo libksba libnettle libogg libpcap libpipeline libpng
 libreadline libredwg libressl libsasl2 libshine libsndfile libsolv libssh libtasn1
@@ -50,6 +50,9 @@ libxslt libz libzip wolfssl")";
 : ${PKG_LIBELF_CONFIGURE_ARGS:="--disable-nls --host=${DEFAULT_TARGET} --prefix= --program-prefix= --target=${DEFAULT_TARGET}"};
 : ${PKG_LIBELF_MAKE_INSTALL_VNAME:=prefix};
 : ${PKG_LIBELF_PATCHES_EXTRA:="${BUILD_WORKDIR}/chainport/patches/libelf/libelf-${PKG_LIBELF_VERSION}.midipix.patch"};
+: ${PKG_LIBESTR_SHA256SUM:=46632b2785ff4a231dcf241eeb0dcb5fc0c7d4da8ee49cf5687722cdbe8b2024};
+: ${PKG_LIBESTR_VERSION:=0.1.11};
+: ${PKG_LIBESTR_URL:=http://libestr.adiscon.com/files/download/libestr-${PKG_LIBESTR_VERSION}.tar.gz};
 : ${PKG_LIBEVENT_SHA256SUM:=e864af41a336bb11dab1a23f32993afe963c1f69618bd9292b89ecf6904845b0};
 : ${PKG_LIBEVENT_VERSION:=2.1.10-stable};
 : ${PKG_LIBEVENT_URL:=https://github.com/libevent/libevent/releases/download/release-${PKG_LIBEVENT_VERSION}/libevent-${PKG_LIBEVENT_VERSION}.tar.gz};