diff --git a/src/github.com/matrix-org/dendrite/roomserver/types/types.go b/src/github.com/matrix-org/dendrite/roomserver/types/types.go
index c97af06d7..9187a21c7 100644
--- a/src/github.com/matrix-org/dendrite/roomserver/types/types.go
+++ b/src/github.com/matrix-org/dendrite/roomserver/types/types.go
@@ -138,6 +138,7 @@ type RoomRecentEventsUpdater interface {
 	// Check whether the eventReference is already referenced by another matrix event.
 	IsReferenced(eventReference gomatrixserverlib.EventReference) (bool, error)
 	// Set the list of latest events for the room.
+	// This replaces the current list stored in the database with the given list.
 	SetLatestEvents(roomNID RoomNID, latest []StateAtEventAndReference) error
 	// Commit the transaction
 	Commit() error