diff --git a/addons/payment_authorize/models/authorize_request.py b/addons/payment_authorize/models/authorize_request.py
index 922d9df1bf1..e3e65648ee0 100644
--- a/addons/payment_authorize/models/authorize_request.py
+++ b/addons/payment_authorize/models/authorize_request.py
@@ -226,7 +226,7 @@ class AuthorizeAPI():
         etree.SubElement(customer, "email").text = partner.email or ''
         response = self._authorize_request(root)
         res = dict()
-        if not response.find('customerProfileId'):
+        if response.find('customerProfileId') is None:  # Warning: do not use bool(etree) as the semantics is very misleading
             _logger.warning(
                 'Unable to create customer payment profile, data missing from transaction. Transaction_id: %s - Partner_id: %s'
                 % (transaction_id, partner)