diff -ur a/include/libssl_compat.h ntp-4.2.8p10/include/libssl_compat.h
--- ntp-4.2.8p10.orig/include/libssl_compat.h	2017-03-21 06:04:20.000000000 -0700
+++ ntp-4.2.8p10/include/libssl_compat.h	2017-03-30 16:34:03.892173084 -0700
@@ -37,7 +37,7 @@
 #endif
 
 /* ----------------------------------------------------------------- */
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L || defined LIBRESSL_VERSION_NUMBER)
 /* ----------------------------------------------------------------- */
 
 # include <openssl/objects.h>
diff -ur ntp-4.2.8p10.orig/libntp/a_md5encrypt.c ntp-4.2.8p10/libntp/a_md5encrypt.c
--- ntp-4.2.8p10.orig/libntp/a_md5encrypt.c	2017-02-01 01:47:13.000000000 -0800
+++ ntp-4.2.8p10/libntp/a_md5encrypt.c	2017-03-30 16:55:49.830229507 -0700
@@ -11,6 +11,7 @@
 #include "ntp.h"
 #include "ntp_md5.h"	/* provides OpenSSL digest API */
 #include "isc/string.h"
+#include "libssl_compat.h"
 /*
  * MD5authencrypt - generate message digest
  *
diff -ur ntp-4.2.8p10.orig/libntp/libssl_compat.c ntp-4.2.8p10/libntp/libssl_compat.c
--- ntp-4.2.8p10.orig/libntp/libssl_compat.c	2017-02-01 01:47:13.000000000 -0800
+++ ntp-4.2.8p10/libntp/libssl_compat.c	2017-03-30 16:52:17.287543795 -0700
@@ -26,7 +26,7 @@
 /* ----------------------------------------------------------------- */
 
 /* ----------------------------------------------------------------- */
-#if defined(OPENSSL) && OPENSSL_VERSION_NUMBER < 0x10100000L
+#if defined(OPENSSL) && (OPENSSL_VERSION_NUMBER < 0x10100000L || defined LIBRESSL_VERSION_NUMBER)
 /* ----------------------------------------------------------------- */
 
 #include "libssl_compat.h"