diff --git a/src/matrix/storage/idb/schema.js b/src/matrix/storage/idb/schema.js
index f0c052ea..aeb85a4b 100644
--- a/src/matrix/storage/idb/schema.js
+++ b/src/matrix/storage/idb/schema.js
@@ -113,5 +113,5 @@ function createInviteStore(db) {
 
 // v8
 function createArchivedRoomSummaryStore(db) {
-    db.createObjectStore("archivedRoomSummary", {keyPath: "roomId"});
+    db.createObjectStore("archivedRoomSummary", {keyPath: "summary.roomId"});
 }
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