HTTPD_CGI_CALL(io, "led-io", led_io );\r
\r
\r
-static const struct httpd_cgi_call *calls[] = { &file, &tcp, &net, &rtos, &io, NULL };\r
+static const struct httpd_cgi_call * const calls[] = { &file, &tcp, &net, &rtos, &io, NULL };\r
\r
/*---------------------------------------------------------------------------*/\r
static\r