diff --git a/src/matrix/storage/idb/schema.js b/src/matrix/storage/idb/schema.js
index 256b6732..352c810c 100644
--- a/src/matrix/storage/idb/schema.js
+++ b/src/matrix/storage/idb/schema.js
@@ -140,5 +140,5 @@ async function migrateOperationScopeIndex(db, txn) {
 
 //v10
 function createTimelineRelationsStore(db) {
-    db.createObjectStore("timelineRelations", {keyPath: ""});
-}
\ No newline at end of file
+    db.createObjectStore("timelineRelations", {keyPath: "key"});
+}
diff --git a/src/matrix/storage/idb/stores/TimelineRelationStore.js b/src/matrix/storage/idb/stores/TimelineRelationStore.js
index 013fb2d6..bba24fc3 100644
--- a/src/matrix/storage/idb/stores/TimelineRelationStore.js
+++ b/src/matrix/storage/idb/stores/TimelineRelationStore.js
@@ -30,7 +30,7 @@ export class TimelineRelationStore {
     }
 
     add(roomId, targetEventId, relType, sourceEventId) {
-        return this._store.add(encodeKey(roomId, targetEventId, relType, sourceEventId));
+        return this._store.add({key: encodeKey(roomId, targetEventId, relType, sourceEventId)});
     }
 
     remove(roomId, targetEventId, relType, sourceEventId) {
@@ -56,8 +56,8 @@ export class TimelineRelationStore {
             true,
             true
         );
-        const keys = await this._store.selectAll(range);
-        return keys.map(decodeKey);
+        const items = await this._store.selectAll(range);
+        return items.map(i => decodeKey(i.key));
     }
 
     async getAllForTarget(roomId, targetId) {
@@ -69,7 +69,7 @@ export class TimelineRelationStore {
             true,
             true
         );
-        const keys = await this._store.selectAll(range);
-        return keys.map(decodeKey);
+        const items = await this._store.selectAll(range);
+        return items.map(i => decodeKey(i.key));
     }
 }