1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index a167498add..1d779d2978 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -317,7 +317,7 @@ class AuthHandler(BaseHandler):
             except StoreError:
                 raise SynapseError(400, "Unknown session ID: %s" % (sid,))
 
-            if not clientdict:
+            if clientdict:
                 # This was designed to allow the client to omit the parameters
                 # and just supply the session in subsequent calls so it split
                 # auth between devices by just sharing the session, (eg. so you
@@ -327,6 +327,8 @@ class AuthHandler(BaseHandler):
                 # on a homeserver.
                 # Revisit: Assuming the REST APIs do sensible validation, the data
                 # isn't arbitrary.
+                await self.store.set_ui_auth_clientdict(sid, clientdict)
+            else:
                 clientdict = session.clientdict
 
         if not authdict: