Index: src/ctx.c
--- src/ctx.c.orig
+++ src/ctx.c
@@ -91,7 +91,7 @@ NOEXPORT void set_prompt(const char *);
 NOEXPORT int ui_retry();
 
 /* session tickets */
-#if OPENSSL_VERSION_NUMBER >= 0x10101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
 NOEXPORT int generate_session_ticket_cb(SSL *, void *);
 NOEXPORT int decrypt_session_ticket_cb(SSL *, SSL_SESSION *,
     const unsigned char *, size_t, SSL_TICKET_STATUS, void *);
@@ -179,7 +179,7 @@ int context_init(SERVICE_OPTIONS *section) { /* init T
     }
     current_section=section; /* setup current section for callbacks */
 
-#if OPENSSL_VERSION_NUMBER>=0x10100000L
+#if OPENSSL_VERSION_NUMBER>=0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
     /* set the security level */
     if(section->security_level>=0) {
         /* set the user-specified value */
@@ -265,7 +265,7 @@ int context_init(SERVICE_OPTIONS *section) { /* init T
 #endif
 
     /* setup session tickets */
-#if OPENSSL_VERSION_NUMBER >= 0x10101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
     SSL_CTX_set_session_ticket_cb(section->ctx, generate_session_ticket_cb,
         decrypt_session_ticket_cb, NULL);
 #endif /* OpenSSL 1.1.1 or later */
@@ -539,7 +539,7 @@ NOEXPORT int ecdh_init(SERVICE_OPTIONS *section) {
 /**************************************** initialize OpenSSL CONF */
 
 NOEXPORT int conf_init(SERVICE_OPTIONS *section) {
-#if OPENSSL_VERSION_NUMBER>=0x10002000L
+#if OPENSSL_VERSION_NUMBER>=0x10002000L && !defined(LIBRESSL_VERSION_NUMBER)
     SSL_CONF_CTX *cctx;
     NAME_LIST *curr;
     char *cmd, *param;
@@ -1045,7 +1045,7 @@ NOEXPORT int ui_retry() {
 
 /**************************************** session tickets */
 
-#if OPENSSL_VERSION_NUMBER >= 0x10101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
 
 typedef struct {
     void *session_authenticated;
@@ -1538,7 +1538,7 @@ NOEXPORT void info_callback(const SSL *ssl, int where,
 
     c=SSL_get_ex_data((SSL *)ssl, index_ssl_cli);
     if(c) {
-#if OPENSSL_VERSION_NUMBER>=0x10100000L
+#if OPENSSL_VERSION_NUMBER>=0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
         OSSL_HANDSHAKE_STATE state=SSL_get_state(ssl);
 #else
         int state=SSL_get_state((SSL *)ssl);