diff --git a/event-schemas/schema/v1/m.room.member b/event-schemas/schema/v1/m.room.member
index 54ae9100..121f144a 100644
--- a/event-schemas/schema/v1/m.room.member
+++ b/event-schemas/schema/v1/m.room.member
@@ -67,6 +67,7 @@
                 "type": "object",
                 "title": "StrippedState",
                 "description": "A stripped down state event, with only the ``type``, ``state_key`` and ``content`` keys.",
+                "required": ["type", "state_key", "content"],
                 "properties": {
                     "type": {
                         "type": "string",
diff --git a/templating/matrix_templates/units.py b/templating/matrix_templates/units.py
index 33b5e6b4..9a17dd5b 100644
--- a/templating/matrix_templates/units.py
+++ b/templating/matrix_templates/units.py
@@ -532,7 +532,8 @@ class MatrixUnits(Units):
                     Units.prop(json_schema, "properties/content")
                 )
 
-                # this is horrible
+                # This is horrible because we're special casing a key on m.room.member.
+                # We need to do this because we want to document a non-content object.
                 if schema["type"] == "m.room.member":
                     invite_room_state = get_json_schema_object_fields(
                         json_schema["properties"]["invite_room_state"]["items"]