diff --git a/src/api/restful/commerce/taxonomy/index.ts b/src/api/restful/commerce/taxonomy/index.ts
index 682cfbe..a05b8e8 100644
--- a/src/api/restful/commerce/taxonomy/index.ts
+++ b/src/api/restful/commerce/taxonomy/index.ts
@@ -128,7 +128,7 @@ export default class Taxonomy extends Restful implements OpenApi<operations> {
       params: {
         category_id: categoryId,
         compatibility_property: compatibilityProperty,
-        filter
+        ...(filter?.trim() && { filter })
       }
     });
   }