diff --git a/src/TLSClient.cpp b/src/TLSClient.cpp
index b40756e32..6d8e520fb 100644
--- a/src/TLSClient.cpp
+++ b/src/TLSClient.cpp
@@ -225,7 +225,11 @@ void TLSClient::connect (const std::string& host, const std::string& port)
   if (p == NULL)
     throw format (STRING_CMD_SYNC_CONNECT, host, port);
 
+#if GNUTLS_VERSION_NUMBER >= 0x030109
+  gnutls_transport_set_int (_session, _socket);
+#else
   gnutls_transport_set_ptr (_session, (gnutls_transport_ptr_t) (long) _socket);
+#endif
 
   // Perform the TLS handshake
   int ret;