diff --git a/src/user/approval.js b/src/user/approval.js
index 3a0a07691c..22c59c5938 100644
--- a/src/user/approval.js
+++ b/src/user/approval.js
@@ -157,6 +157,9 @@ module.exports = function(User) {
 						return next(null, user);
 					}
 
+					// temporary: see http://www.stopforumspam.com/forum/viewtopic.php?id=6392
+					user.ip = user.ip.replace('::ffff:', '');
+
 					request('http://api.stopforumspam.org/api?ip=' + user.ip + '&email=' + user.email + '&username=' + user.username + '&f=json', function (err, response, body) {
 						if (err) {
 							return next(null, user);