diff --git a/src/types/db.ts b/src/types/db.ts
index 838fc67..f55d121 100644
--- a/src/types/db.ts
+++ b/src/types/db.ts
@@ -1,4 +1,4 @@
-// Result row used by TileDatabase to return BLOB mbtile data encoding feature boundaries
+// Result row used by TileDatabase to return BLOB mbtile data encoding feature boundaries for a single tile.
 export interface TileDataResultRow {
     tile_data: object;
 }