diff --git a/server_https.hpp b/server_https.hpp
index 4150eb2..7360c89 100644
--- a/server_https.hpp
+++ b/server_https.hpp
@@ -47,10 +47,9 @@ namespace SimpleWeb {
         // Creating session_id_context from address:port but reversed due to small SSL_MAX_SSL_SESSION_ID_LENGTH
         auto session_id_context = std::to_string(acceptor->local_endpoint().port()) + ':';
         session_id_context.append(config.address.rbegin(), config.address.rend());
-        const auto session_id_length = static_cast<unsigned int>(std::min<std::size_t>(session_id_context.size(), SSL_MAX_SSL_SESSION_ID_LENGTH));
         SSL_CTX_set_session_id_context(context.native_handle(),
                                        reinterpret_cast<const unsigned char *>(session_id_context.data()),
-                                       session_id_length);
+                                       static_cast<unsigned int>(std::min<std::size_t>(session_id_context.size(), SSL_MAX_SSL_SESSION_ID_LENGTH)));
       }
     }