1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 5ba94be2ec..ebb81be377 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -393,7 +393,7 @@ class FederationStateServlet(BaseFederationServlet):
         return self.handler.on_context_state_request(
             origin,
             context,
-            parse_string_from_args(query, "event_id", None),
+            parse_string_from_args(query, "event_id", None, required=True),
         )
 
 
@@ -404,7 +404,7 @@ class FederationStateIdsServlet(BaseFederationServlet):
         return self.handler.on_state_ids_request(
             origin,
             room_id,
-            parse_string_from_args(query, "event_id", None),
+            parse_string_from_args(query, "event_id", None, required=True),
         )