diff --git a/osinaweb/osinacore/api/views.py b/osinaweb/osinacore/api/views.py
index d7aa2d7a..2d4cd70c 100644
--- a/osinaweb/osinacore/api/views.py
+++ b/osinaweb/osinacore/api/views.py
@@ -12,7 +12,8 @@ def register_customer(request):
         if user_serializer.is_valid():
             user = user_serializer.save()
             customer_data = request.data['customer']
-            customer_data['user'] = user
+            user_data = UserSerializer(user).data
+            customer_data['user'] = user_data
             customer_serializer = CustomerProfileSerializer(data=customer_data)
             if customer_serializer.is_valid():
                 customer_serializer.save()