diff --git a/tryton/tryton/rpc.py b/tryton/tryton/rpc.py
index 8958820ce3..1647655a39 100644
--- a/tryton/tryton/rpc.py
+++ b/tryton/tryton/rpc.py
@@ -65,7 +65,7 @@ def server_version(host, port):
         logger.debug('%r', result)
         return result
     except Exception as e:
-        logger.error(e)
+        logger.exception(e)
         return None
 
 
@@ -77,7 +77,7 @@ def authentication_services(host, port):
         logger.debug('%r', services)
         return connection.url, services
     except Exception as e:
-        logger.error(e)
+        logger.exception(e)
         return '', []