diff --git a/src/dexorder/event_handler.py b/src/dexorder/event_handler.py
index 4f2c157..988f9c9 100644
--- a/src/dexorder/event_handler.py
+++ b/src/dexorder/event_handler.py
@@ -108,7 +108,7 @@ async def handle_order_cancel_all(event: EventData):
     log.debug(f'DexorderCancelAll {event}')
     vault = event['address']
     cancelAllIndex = event['args']['cancelAllIndex']
-    for orderIndex in Order.vault_open_orders[vault]:
+    for orderIndex in Order.vault_open_orders.get(vault,[]):
         if orderIndex < cancelAllIndex:
             try:
                 order: Order = Order.of(vault, orderIndex)