diff --git a/api/client-server/definitions/event_filter.yaml b/api/client-server/definitions/event_filter.yaml
index 27cce87d..8bedacb2 100644
--- a/api/client-server/definitions/event_filter.yaml
+++ b/api/client-server/definitions/event_filter.yaml
@@ -5,14 +5,14 @@ properties:
   not_senders:
     description: A list of sender IDs to exclude. If this list is absent then no senders
       are excluded. A matching sender will be excluded even if it is listed in the
-      'senders' filter.
+      ``'senders'`` filter.
     items:
       type: string
     type: array
   not_types:
     description: A list of event types to exclude. If this list is absent then no
       event types are excluded. A matching type will be excluded even if it is listed
-      in the 'types' filter. A '*' can be used as a wildcard to match any sequence
+      in the ``'types'`` filter. A '*' can be used as a wildcard to match any sequence
       of characters.
     items:
       type: string
@@ -25,7 +25,7 @@ properties:
     type: array
   types:
     description: A list of event types to include. If this list is absent then all
-      event types are included. A '*' can be used as a wildcard to match any sequence
+      event types are included. A ``'*'`` can be used as a wildcard to match any sequence
       of characters.
     items:
       type: string
diff --git a/api/client-server/definitions/room_event_filter.yaml b/api/client-server/definitions/room_event_filter.yaml
index 628e2ca8..0ad1ae33 100644
--- a/api/client-server/definitions/room_event_filter.yaml
+++ b/api/client-server/definitions/room_event_filter.yaml
@@ -3,7 +3,7 @@ allOf:
 properties:
   not_rooms:
     description: A list of room IDs to exclude. If this list is absent then no rooms
-      are excluded. A matching room will be excluded even if it is listed in the 'rooms'
+      are excluded. A matching room will be excluded even if it is listed in the ``'rooms'``
       filter.
     items:
       type: string
diff --git a/api/client-server/definitions/sync_filter.yaml b/api/client-server/definitions/sync_filter.yaml
index fc154f3a..09307c99 100644
--- a/api/client-server/definitions/sync_filter.yaml
+++ b/api/client-server/definitions/sync_filter.yaml
@@ -26,6 +26,21 @@ properties:
     description: The user account data that isn't associated with rooms to include.
   room:
     properties:
+      not_rooms:
+        description: A list of room IDs to exclude. If this list is absent then no rooms
+          are excluded. A matching room will be excluded even if it is listed in the ``'rooms'``
+          filter. This filter is applied before the filters in ``ephemeral``, 
+          ``state``, ``timeline`` or ``account_data``
+        items:
+          type: string
+        type: array
+      rooms:
+        description: A list of room IDs to include. If this list is absent then all rooms
+          are included. This filter is applied before the filters in ``ephemeral``,
+          ``state``, ``timeline`` or ``account_data``
+        items:
+          type: string
+        type: array
       ephemeral:
         allOf:
         - $ref: room_event_filter.yaml