1 files changed, 1 insertions, 0 deletions
diff --git a/packages/asset-buyer/src/order_fetchers/standard_relayer_api_order_fetcher.ts b/packages/asset-buyer/src/order_fetchers/standard_relayer_api_order_fetcher.ts
index bf177b93b..5688daf69 100644
--- a/packages/asset-buyer/src/order_fetchers/standard_relayer_api_order_fetcher.ts
+++ b/packages/asset-buyer/src/order_fetchers/standard_relayer_api_order_fetcher.ts
@@ -60,6 +60,7 @@ export class StandardRelayerAPIOrderFetcher implements OrderFetcher {
      * @return  An instance of OrderFetcherResponse. See type for more information.
      */
     public async fetchOrdersAsync(orderFetchRequest: OrderFetcherRequest): Promise<OrderFetcherResponse> {
+        assert.isValidOrderFetcherRequest('orderFetchRequest', orderFetchRequest);
         const { makerAssetData, takerAssetData, networkId } = orderFetchRequest;
         const orderbookRequest = { baseAssetData: makerAssetData, quoteAssetData: takerAssetData };
         const requestOpts = { networkId };