1 files changed, 1 insertions, 1 deletions
diff --git a/packages/order-watcher/src/order_watcher/dependent_order_hashes_tracker.ts b/packages/order-watcher/src/order_watcher/dependent_order_hashes_tracker.ts
index dbcc25186..1ec568a9b 100644
--- a/packages/order-watcher/src/order_watcher/dependent_order_hashes_tracker.ts
+++ b/packages/order-watcher/src/order_watcher/dependent_order_hashes_tracker.ts
@@ -50,7 +50,7 @@ export class DependentOrderHashesTracker {
         return uniqueOrderHashList;
     }
     public getDependentOrderHashesByMaker(makerAddress: string): string[] {
-        const dependentOrderHashes = Array.from(this._orderHashesByMakerAddress[makerAddress]);
+        const dependentOrderHashes = Array.from(this._orderHashesByMakerAddress[makerAddress] || {});
         return dependentOrderHashes;
     }
     public getDependentOrderHashesByAssetDataByMaker(makerAddress: string, assetData: string): string[] {