diff --git a/dirmngr/http.c b/dirmngr/http.c
index c2a043119..1365ea109 100644
--- a/dirmngr/http.c
+++ b/dirmngr/http.c
@@ -1475,7 +1475,9 @@ send_request (http_t hd, const char *httphost, const char *auth,
     {
       int mode;
 
+#if ASSUAN_VERSION_NUMBER >= 0x020300 /* >= 2.3.0 */
       if (assuan_sock_get_flag (ASSUAN_INVALID_FD, "tor-mode", &mode) || !mode)
+#endif
         {
           log_error ("TOR support is not available\n");
           return gpg_err_make (default_errsource, GPG_ERR_NOT_IMPLEMENTED);