Index: modules/ssl/ssl_engine_init.c
===================================================================
--- modules/ssl/ssl_engine_init.c	(revision 1872279)
+++ modules/ssl/ssl_engine_init.c	(working copy)
@@ -1621,7 +1621,7 @@
     X509_STORE_CTX *sctx;
     X509_STORE *store = SSL_CTX_get_cert_store(mctx->ssl_ctx);
 
-#if OPENSSL_VERSION_NUMBER >= 0x1010100fL
+#if OPENSSL_VERSION_NUMBER >= 0x1010100fL && !defined(LIBRESSL_VERSION_NUMBER)
     /* For OpenSSL >=1.1.1, turn on client cert support which is
      * otherwise turned off by default (by design).
      * https://github.com/openssl/openssl/issues/6933 */
Index: modules/ssl/ssl_private.h
===================================================================
--- modules/ssl/ssl_private.h	(revision 1872279)
+++ modules/ssl/ssl_private.h	(working copy)
@@ -228,9 +228,11 @@
 #define BN_get_rfc3526_prime_4096  get_rfc3526_prime_4096
 #define BN_get_rfc3526_prime_6144  get_rfc3526_prime_6144
 #define BN_get_rfc3526_prime_8192  get_rfc3526_prime_8192
+#if !defined(LIBRESSL_VERSION_NUMBER) || LIBRESSL_VERSION_NUMBER < 0x2070000fL
 #define BIO_set_init(x,v)          (x->init=v)
 #define BIO_get_data(x)            (x->ptr)
 #define BIO_set_data(x,v)          (x->ptr=v)
+#endif
 #define BIO_get_shutdown(x)        (x->shutdown)
 #define BIO_set_shutdown(x,v)      (x->shutdown=v)
 #define DH_bits(x)                 (BN_num_bits(x->p))