diff --git a/tryton/tryton/common/common.py b/tryton/tryton/common/common.py
index 5c7a53e760..7aa9f236d2 100644
--- a/tryton/tryton/common/common.py
+++ b/tryton/tryton/common/common.py
@@ -1254,7 +1254,7 @@ class RPCProgress(object):
 
         def return_():
             if self.exception:
-                raise self.exception
+                raise RPCException(self.exception)
             else:
                 return self.res