diff --git a/src/orderbook_call_builder.js b/src/orderbook_call_builder.js
index d6ca9c980..e6ba0ec2e 100644
--- a/src/orderbook_call_builder.js
+++ b/src/orderbook_call_builder.js
@@ -11,14 +11,14 @@ export class OrderbookCallBuilder extends CallBuilder {
         super(url);
         this.url.segment('order_book');
         if (!selling.isNative()) {
-            this.url.addQuery("selling_asset_type", 'credit_alphanum4');
+            this.url.addQuery("selling_asset_type", selling.getAssetType());
             this.url.addQuery("selling_asset_code", selling.getCode());
             this.url.addQuery("selling_asset_issuer", selling.getIssuer());
         } else {
             this.url.addQuery("selling_asset_type", 'native');
         }
         if (!buying.isNative()) {
-            this.url.addQuery("buying_asset_type", 'credit_alphanum4');
+            this.url.addQuery("buying_asset_type", buying.getAssetType());
             this.url.addQuery("buying_asset_code", buying.getCode());
             this.url.addQuery("buying_asset_issuer", buying.getIssuer());
         } else {