diff --git a/routers/user/auth.go b/routers/user/auth.go
index c49cfc671..d652719ff 100755
--- a/routers/user/auth.go
+++ b/routers/user/auth.go
@@ -1369,7 +1369,7 @@ func SignUpPost(ctx *context.Context, cpt *captcha.Captcha, form auth.RegisterFo
 	invitationCode := ctx.Query("invitation_code")
 	log.Info("enter here, and form.InvitaionCode =" + invitationCode)
 	if invitationCode != "" {
-		RegisteUserByInvitaionCode(form, u.ID)
+		RegisteUserByInvitaionCode(invitationCode, u.ID)
 	}
 
 	err := models.AddEmailAddress(&models.EmailAddress{