diff --git a/storage/schema.go b/storage/schema.go
index 49aed25..e80c90b 100644
--- a/storage/schema.go
+++ b/storage/schema.go
@@ -12,6 +12,7 @@ const SchemaThunderballResults = `
 CREATE TABLE IF NOT EXISTS results_thunderball (
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
 	draw_date TEXT NOT NULL UNIQUE,
+	draw_id INTEGER NOT NULL UNIQUE,
 	machine TEXT,
 	ballset TEXT,
 	ball1 INTEGER,
@@ -72,6 +73,7 @@ const SchemaLottoResults = `
 CREATE TABLE IF NOT EXISTS results_lotto (
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
 	draw_date TEXT NOT NULL UNIQUE,
+	draw_id INTEGER NOT NULL UNIQUE,
 	machine TEXT,
 	ballset TEXT,
 	ball1 INTEGER,