diff --git a/py_gen/templates/message.py b/py_gen/templates/message.py
index d81d5b7..228d2d0 100644
--- a/py_gen/templates/message.py
+++ b/py_gen/templates/message.py
@@ -36,6 +36,9 @@
 import const
 import common
 import action # for unpack_list
+:: if version >= 4:
+import meter_band # for unpack_list
+:: #endif
 import util
 import loxi.generic_util