diff --git a/crypto.hpp b/crypto.hpp
index c8e8cee..981f214 100644
--- a/crypto.hpp
+++ b/crypto.hpp
@@ -69,7 +69,7 @@ namespace SimpleWeb {
         b64 = BIO_new(BIO_f_base64());
         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
 // TODO: Remove in 2020
-#if OPENSSL_VERSION_NUMBER <= 0x1000115fL
+#if(defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER <= 0x1000115fL) || (defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x2080000fL)
         bio = BIO_new_mem_buf((char *)&base64[0], static_cast<int>(base64.size()));
 #else
         bio = BIO_new_mem_buf(&base64[0], static_cast<int>(base64.size()));
@@ -223,5 +223,5 @@ namespace SimpleWeb {
       return key;
     }
   };
-}
+} // namespace SimpleWeb
 #endif /* SIMPLE_WEB_CRYPTO_HPP */