diff --git a/correios/client.py b/correios/client.py
index 368a73b..482dc03 100644
--- a/correios/client.py
+++ b/correios/client.py
@@ -260,7 +260,7 @@ def calculate_freights(
             str(from_zip),
             str(to_zip),
             package.weight / KG,
-            package.package_type,
+            package.freight_package_type,
             package.length,
             package.height,
             package.width,