--- a/dataimport/deprecated.py	Fri Sep 11 14:52:09 2015 +0200
+++ b/dataimport/deprecated.py	Fri Sep 11 15:29:25 2015 +0200
@@ -167,7 +167,9 @@
                 if res[dest] is None:
                     break
         except ValueError as err:
-            raise ValueError('error with %r field: %s' % (src, err)), None, sys.exc_info()[-1]
+            exc = ValueError('error with %r field: %s' % (src, err))
+            exc.__traceback__ = sys.exc_info()[-1]
+            raise exc
     return res