Index: src/options.c
--- src/options.c.orig
+++ src/options.c
@@ -38,7 +38,7 @@
 #include "common.h"
 #include "prototypes.h"
 
-#if OPENSSL_VERSION_NUMBER >= 0x10101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
 #define DEFAULT_CURVES "X25519:P-256:X448:P-521:P-384"
 #else /* OpenSSL version < 1.1.1 */
 #define DEFAULT_CURVES "prime256v1"