Index: lib/libarchive/Makefile
===================================================================
--- lib/libarchive/Makefile
+++ lib/libarchive/Makefile
@@ -6,8 +6,8 @@
 
 LIB=	archive
 
-LIBADD=	z bz2 lzma bsdxml
-CFLAGS+= -DHAVE_BZLIB_H=1 -DHAVE_LIBLZMA=1 -DHAVE_LZMA_H=1
+LIBADD=	z bz2 lzma bsdxml zstd
+CFLAGS+= -DHAVE_BZLIB_H=1 -DHAVE_LIBLZMA=1 -DHAVE_LZMA_H=1 -DHAVE_ZSTD_H=1 -DHAVE_LIBZSTD=1
 
 # FreeBSD SHLIB_MAJOR value is managed as part of the FreeBSD system.
 # It has no real relation to the libarchive version number.
@@ -15,6 +15,7 @@
 
 CFLAGS+=	-DPLATFORM_CONFIG_H=\"${.CURDIR}/config_freebsd.h\"
 CFLAGS+=	-I${.OBJDIR}
+CFLAGS+=	-I${SRCTOP}/sys/contrib/zstd/lib
 
 .if ${MK_OPENSSL} != "no"
 CFLAGS+=	-DWITH_OPENSSL