Anti-Splog https not loading recaptcha

Hi

Problem signing up for a site on my network (uses TLS)

I am getting chrome console error:

wp-signup.php' was loaded over HTTPS, but requested an insecure script 'http://www.google.com/recaptcha/api/challenge?k=6LeO5QETAAAAAP0AtLf7oFisZbaSodKnPf6_WMNb'. This request has been blocked; the content must be served over HTTPS.

Have added

define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api");
define("RECAPTCHA_API_SECURE_SERVER", "https://www.google.com/recaptcha/api");

to WPconfig as suggested in an ancient thread somewhere, did not resolve the issue.

Any pointers on how to get the reCaptcha to load up?

Best regards,
Bjørn Seaton