diff --git a/src/stores/AutoRageshakeStore.ts b/src/stores/AutoRageshakeStore.ts
index b09205841c..2d20b95da4 100644
--- a/src/stores/AutoRageshakeStore.ts
+++ b/src/stores/AutoRageshakeStore.ts
@@ -142,9 +142,9 @@ export default class AutoRageshakeStore extends AsyncStoreWithClient<IState> {
         }
     }
 
-    private async onSyncStateChange(_state: SyncState, _prevState: SyncState, data: ISyncStateData): Promise<void> {
+    private async onSyncStateChange(_state: SyncState, _prevState: SyncState, data?: ISyncStateData): Promise<void> {
         if (!this.state.initialSyncCompleted) {
-            await this.updateState({ initialSyncCompleted: !!data.nextSyncToken });
+            await this.updateState({ initialSyncCompleted: !!data?.nextSyncToken });
         }
     }