Index: src/ssl.c
--- src/ssl.c.orig
+++ src/ssl.c
@@ -44,7 +44,7 @@ NOEXPORT void cb_new_auth(void *parent, void *ptr, CRY
 #if OPENSSL_VERSION_NUMBER>=0x30000000L
 NOEXPORT int cb_dup_addr(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
     void **from_d, int idx, long argl, void *argp);
-#elif OPENSSL_VERSION_NUMBER>=0x10100000L
+#elif OPENSSL_VERSION_NUMBER>=0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
 NOEXPORT int cb_dup_addr(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
     void *from_d, int idx, long argl, void *argp);
 #else
@@ -87,7 +87,7 @@ int fips_available() { /* either FIPS provider or cont
 }
 
 int ssl_init(void) { /* init TLS before parsing configuration file */
-#if OPENSSL_VERSION_NUMBER>=0x10100000L
+#if OPENSSL_VERSION_NUMBER>=0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
     OPENSSL_INIT_SETTINGS *conf=OPENSSL_INIT_new();
 #ifdef USE_WIN32
     OPENSSL_INIT_set_config_filename(conf, "..\\config\\openssl.cnf");
@@ -161,7 +161,7 @@ NOEXPORT void cb_new_auth(void *parent, void *ptr, CRY
 #if OPENSSL_VERSION_NUMBER>=0x30000000L
 NOEXPORT int cb_dup_addr(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
         void **from_d, int idx, long argl, void *argp) {
-#elif OPENSSL_VERSION_NUMBER>=0x10100000L
+#elif OPENSSL_VERSION_NUMBER>=0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
 NOEXPORT int cb_dup_addr(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
         void *from_d, int idx, long argl, void *argp) {
 #else