diff --git a/src/cli.c b/src/cli.c
index 88fbae3..e91e33b 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -1002,7 +1002,7 @@
 			     (fdt.iocb == poller_pipe_io_handler) ? "poller_pipe_io_handler" :
 			     (fdt.iocb == mworker_accept_wrapper) ? "mworker_accept_wrapper" :
 #ifdef USE_OPENSSL
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 			     (fdt.iocb == ssl_async_fd_free) ? "ssl_async_fd_free" :
 			     (fdt.iocb == ssl_async_fd_handler) ? "ssl_async_fd_handler" :
 #endif
diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index f2d80e8..e11ddb5 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -57,7 +57,7 @@
 #include <openssl/engine.h>
 #endif
 
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 #include <openssl/async.h>
 #endif
 
@@ -575,7 +575,7 @@
 }
 #endif
 
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 /*
  * openssl async fd handler
  */
@@ -2297,7 +2297,7 @@
 	SSL_set_SSL_CTX(ssl, ctx);
 }
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) || defined(OPENSSL_IS_BORINGSSL)
+#if ((OPENSSL_VERSION_NUMBER >= 0x10101000L) || defined(OPENSSL_IS_BORINGSSL)) && !defined(LIBRESSL_VERSION_NUMBER)
 
 static int ssl_sock_switchctx_err_cbk(SSL *ssl, int *al, void *priv)
 {
@@ -4029,7 +4029,7 @@
 
 	SSL_CTX_set_options(ctx, options);
 
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 	if (global_ssl.async)
 		mode |= SSL_MODE_ASYNC;
 #endif
@@ -4041,7 +4041,7 @@
 #ifdef OPENSSL_IS_BORINGSSL
 	SSL_CTX_set_select_certificate_cb(ctx, ssl_sock_switchctx_cbk);
 	SSL_CTX_set_tlsext_servername_callback(ctx, ssl_sock_switchctx_err_cbk);
-#elif (OPENSSL_VERSION_NUMBER >= 0x10101000L)
+#elif (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
 	if (bind_conf->ssl_conf.early_data) {
 		SSL_CTX_set_options(ctx, SSL_OP_NO_ANTI_REPLAY);
 		SSL_CTX_set_max_early_data(ctx, global.tune.bufsize - global.tune.maxrewrite);
@@ -4817,7 +4817,7 @@
 		options |= SSL_OP_NO_TICKET;
 	SSL_CTX_set_options(ctx, options);
 
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 	if (global_ssl.async)
 		mode |= SSL_MODE_ASYNC;
 #endif
@@ -5370,7 +5370,7 @@
 	if (!conn->xprt_ctx)
 		goto out_error;
 
-#if OPENSSL_VERSION_NUMBER >= 0x10101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined (LIBRESSL_VERSION_NUMBER)
 	/*
 	 * Check if we have early data. If we do, we have to read them
 	 * before SSL_do_handshake() is called, And there's no way to
@@ -5427,7 +5427,7 @@
 				fd_cant_recv(conn->handle.fd);
 				return 0;
 			}
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 			else if (ret == SSL_ERROR_WANT_ASYNC) {
 				ssl_async_process_fds(conn, ctx->ssl);
 				return 0;
@@ -5446,7 +5446,7 @@
 					OSSL_HANDSHAKE_STATE state = SSL_get_state((SSL *)ctx->ssl);
 					empty_handshake = state == TLS_ST_BEFORE;
 #else
-					empty_handshake = !ctx->ssl->packet_length;
+					empty_handshake = SSL_state((SSL *)ctx->ssl) == SSL_ST_BEFORE;
 #endif
 					if (empty_handshake) {
 						if (!errno) {
@@ -5511,7 +5511,7 @@
 			fd_cant_recv(conn->handle.fd);
 			return 0;
 		}
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 		else if (ret == SSL_ERROR_WANT_ASYNC) {
 			ssl_async_process_fds(conn, ctx->ssl);
 			return 0;
@@ -5530,7 +5530,7 @@
 				OSSL_HANDSHAKE_STATE state = SSL_get_state(ctx->ssl);
 				empty_handshake = state == TLS_ST_BEFORE;
 #else
-				empty_handshake = !ctx->ssl->packet_length;
+				empty_handshake = SSL_state((SSL *)ctx->ssl) == SSL_ST_BEFORE;
 #endif
 				if (empty_handshake) {
 					if (!errno) {
@@ -5570,7 +5570,7 @@
 			goto out_error;
 		}
 	}
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L)
+#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
 	else {
 		/*
 		 * If the server refused the early data, we have to send a
@@ -5589,7 +5589,7 @@
 
 reneg_ok:
 
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 	/* ASYNC engine API doesn't support moving read/write
 	 * buffers. So we disable ASYNC mode right after
 	 * the handshake to avoid buffer oveflows.
@@ -5698,7 +5698,7 @@
 			continue;
 		}
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L)
+#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
 		if (conn->flags & CO_FL_EARLY_SSL_HS) {
 			size_t read_length;
 
@@ -5750,7 +5750,7 @@
 				/* handshake is running, and it needs to enable write */
 				conn->flags |= CO_FL_SSL_WAIT_HS;
 				__conn_sock_want_send(conn);
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 				/* Async mode can be re-enabled, because we're leaving data state.*/
 				if (global_ssl.async)
 					SSL_set_mode(ctx->ssl, SSL_MODE_ASYNC);
@@ -5762,7 +5762,7 @@
 					/* handshake is running, and it may need to re-enable read */
 					conn->flags |= CO_FL_SSL_WAIT_HS;
 					__conn_sock_want_recv(conn);
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 					/* Async mode can be re-enabled, because we're leaving data state.*/
 					if (global_ssl.async)
 						SSL_set_mode(ctx->ssl, SSL_MODE_ASYNC);
@@ -5839,7 +5839,7 @@
 	 * in which case we accept to do it once again.
 	 */
 	while (count) {
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L)
+#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined (LIBRESSL_VERSION_NUMBER)
 		size_t written_data;
 #endif
 
@@ -5860,7 +5860,7 @@
 			ctx->xprt_st |= SSL_SOCK_SEND_UNLIMITED;
 		}
 
-#if (OPENSSL_VERSION_NUMBER >= 0x10101000L)
+#if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined (LIBRESSL_VERSION_NUMBER)
 		if (!SSL_is_init_finished(ctx->ssl) && conn_is_back(conn)) {
 			unsigned int max_early;
 
@@ -5912,7 +5912,7 @@
 					/* handshake is running, and it may need to re-enable write */
 					conn->flags |= CO_FL_SSL_WAIT_HS;
 					__conn_sock_want_send(conn);
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 					/* Async mode can be re-enabled, because we're leaving data state.*/
 					if (global_ssl.async)
 						SSL_set_mode(ctx->ssl, SSL_MODE_ASYNC);
@@ -5927,7 +5927,7 @@
 				/* handshake is running, and it needs to enable read */
 				conn->flags |= CO_FL_SSL_WAIT_HS;
 				__conn_sock_want_recv(conn);
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 				/* Async mode can be re-enabled, because we're leaving data state.*/
 				if (global_ssl.async)
 					SSL_set_mode(ctx->ssl, SSL_MODE_ASYNC);
@@ -5955,7 +5955,7 @@
 	struct ssl_sock_ctx *ctx = xprt_ctx;
 
 	if (ctx) {
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 		if (global_ssl.async) {
 			OSSL_ASYNC_FD all_fd[32], afd;
 			size_t num_all_fds = 0;
@@ -8765,7 +8765,7 @@
                                        struct proxy *defpx, const char *file, int line,
                                        char **err)
 {
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
 	global_ssl.async = 1;
 	global.ssl_used_async_engines = nb_engines;
 	return 0;