2 files changed, 2 insertions, 0 deletions
diff --git a/addons/product/models/product.py b/addons/product/models/product.py
index e3ed1900db9..4af2e5355ce 100644
--- a/addons/product/models/product.py
+++ b/addons/product/models/product.py
@@ -331,6 +331,7 @@ class ProductProduct(models.Model):
         return res
 
     @api.multi
+    @api.returns('self', lambda value: value.id)
     def copy(self, default=None):
         # TDE FIXME: clean context / variant brol
         if default is None:
diff --git a/addons/product/models/product_template.py b/addons/product/models/product_template.py
index 3f93f08d450..c00265e711e 100644
--- a/addons/product/models/product_template.py
+++ b/addons/product/models/product_template.py
@@ -336,6 +336,7 @@ class ProductTemplate(models.Model):
         return res
 
     @api.multi
+    @api.returns('self', lambda value: value.id)
     def copy(self, default=None):
         # TDE FIXME: should probably be copy_data
         self.ensure_one()