diff --git a/generator/filters/python/JF17.py b/generator/filters/python/JF17.py
index 0334f39..61b9306 100644
--- a/generator/filters/python/JF17.py
+++ b/generator/filters/python/JF17.py
@@ -2,7 +2,7 @@
 
 from GaugiKernel import Cpp
 from GaugiKernel.macros import *
-
+from ROOT import generator
 
 class JF17( Cpp ):