diff --git a/src/matrix/storage/idb/Transaction.js b/src/matrix/storage/idb/Transaction.js
index 946b06cc..e0982c54 100644
--- a/src/matrix/storage/idb/Transaction.js
+++ b/src/matrix/storage/idb/Transaction.js
@@ -108,7 +108,7 @@ export class Transaction {
     }
 
     get groupSessionDecryptions() {
-        return this._store("groupSessionDecryptions", idbStore => new OutboundGroupSessionStore(idbStore));
+        return this._store("groupSessionDecryptions", idbStore => new GroupSessionDecryptionStore(idbStore));
     }
 
     complete() {