openssl: fix build for version < 1.1.0

Closes #8470

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index fe9a6860d95007b1cbac8968627093bae27707ef..eaf7028f00f67d73a8ed5fe3dc9118d5decc4fac 100644 (file)
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2409,6 +2409,7 @@ set_ssl_version_min_max_legacy(ctx_option_t *ctx_options,
 #ifdef TLS1_3_VERSION
     {
       struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+      struct ssl_backend_data *backend = connssl->backend;
       SSL_CTX_set_max_proto_version(backend->ctx, TLS1_3_VERSION);
       *ctx_options |= SSL_OP_NO_TLSv1_2;
     }