diff --git a/src/dexorder/order/orderstate.py b/src/dexorder/order/orderstate.py
index 39bf3bf..6f73486 100644
--- a/src/dexorder/order/orderstate.py
+++ b/src/dexorder/order/orderstate.py
@@ -172,7 +172,7 @@ class Order:
 
     def complete(self, final_state: SwapOrderState):
         """ updates the static order record with its final values, then deletes all its dynamic blockstate and removes the Order from the actives list """
-        assert final_state in (SwapOrderState.Canceled, SwapOrderState.Expired, SwapOrderState.Filled)
+        assert final_state in (SwapOrderState.Canceled, SwapOrderState.Expired, SwapOrderState.Filled, SwapOrderState.Error)
         status = self.status.copy()
         status.state = final_state
         if self.is_open: