1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/handlers/saml_handler.py b/synapse/handlers/saml_handler.py
index a9645b77d8..ec2ba11c75 100644
--- a/synapse/handlers/saml_handler.py
+++ b/synapse/handlers/saml_handler.py
@@ -81,6 +81,7 @@ class SamlHandler(BaseHandler):
         # the SsoIdentityProvider protocol type.
         self.idp_icon = None
         self.idp_brand = None
+        self.unstable_idp_brand = None
 
         # a map from saml session id to Saml2SessionData object
         self._outstanding_requests_dict = {}  # type: Dict[str, Saml2SessionData]