diff --git a/sonic_psu/psu_base.py b/sonic_psu/psu_base.py
index fe5c3974a6..2e2204298e 100644
--- a/sonic_psu/psu_base.py
+++ b/sonic_psu/psu_base.py
@@ -8,7 +8,7 @@
 
 try:
     import abc
-except ImportError, e:
+except ImportError as e:
     raise ImportError (str(e) + " - required module not found")
 
 class PsuBase(object):