diff --git a/src/Dexie.d.ts b/src/Dexie.d.ts
index 64364e81a..b4fa1f6bf 100644
--- a/src/Dexie.d.ts
+++ b/src/Dexie.d.ts
@@ -16,7 +16,7 @@ declare class Dexie {
     constructor(databaseName: string, options?: {
         addons?: Array<(db: Dexie) => void>,
         autoOpen?: boolean,
-        indexedDB?: IDBDatabase,
+        indexedDB?: IDBFactory,
         IDBKeyRange?: IDBKeyRange
     });