diff --git a/src/shrpx_tls.cc b/src/shrpx_tls.cc
index c5dd9d37..746311f0 100644
--- a/src/shrpx_tls.cc
+++ b/src/shrpx_tls.cc
@@ -364,11 +364,11 @@ int tls_session_new_cb(SSL *ssl, SSL_SESSION *session) {
 
 namespace {
 SSL_SESSION *tls_session_get_cb(SSL *ssl,
-#if OPENSSL_1_1_API
+#if OPENSSL_1_1_API || LIBRESSL_2_7_API
                                 const unsigned char *id,
-#else  // !OPENSSL_1_1_API
+#else  // !(OPENSSL_1_1_API || LIBRESSL_2_7_API)
                                 unsigned char *id,
-#endif // !OPENSSL_1_1_API
+#endif // !(OPENSSL_1_1_API || LIBRESSL_2_7_API)
                                 int idlen, int *copy) {
   auto conn = static_cast<Connection *>(SSL_get_app_data(ssl));
   auto handler = static_cast<ClientHandler *>(conn->data);