diff --git a/core/admin/mailu/utils.py b/core/admin/mailu/utils.py
index 7a247cfc02..a2279c93ed 100644
--- a/core/admin/mailu/utils.py
+++ b/core/admin/mailu/utils.py
@@ -163,7 +163,7 @@ def get_redirect_url(self):
             "response_type": ["code"],
             "scope": ["openid"],
             "nonce": f_session["nonce"],
-            "redirect_uri": f"https://{self.app.config['HOSTNAME']}/sso/login",
+            "redirect_uri": f"https://{self.app.config['HOSTNAME']}/sso/login/oic",
             "state": f_session["state"]
         }