diff --git a/data/api/client-server/space_hierarchy.yaml b/data/api/client-server/space_hierarchy.yaml
index f7b98511..9b33ee66 100644
--- a/data/api/client-server/space_hierarchy.yaml
+++ b/data/api/client-server/space_hierarchy.yaml
@@ -92,7 +92,7 @@ paths:
                       allOf:
                         - $ref: definitions/public_rooms_chunk.yaml
                         - type: object
-                          title: ChildRoomsChunk
+                          title: SpaceHierarchyRoomsChunk
                           properties:
                             room_type:
                               type: string
diff --git a/data/api/server-server/space_hierarchy.yaml b/data/api/server-server/space_hierarchy.yaml
index aa98158f..31344f17 100644
--- a/data/api/server-server/space_hierarchy.yaml
+++ b/data/api/server-server/space_hierarchy.yaml
@@ -63,6 +63,7 @@ paths:
                     allOf:
                       - $ref: ../client-server/definitions/public_rooms_chunk.yaml
                       - type: object
+                        title: SpaceHierarchyParentRoom
                         properties:
                           room_type:
                             type: string
@@ -106,6 +107,7 @@ paths:
                       allOf:
                         - $ref: ../client-server/definitions/public_rooms_chunk.yaml
                         - type: object
+                          title: SpaceHierarchyChildRoomsChunk
                           properties:
                             room_type:
                               type: string