diff --git a/device/celestica/x86_64-cel_seastone-r0/sonic_platform/event.py b/device/celestica/x86_64-cel_seastone-r0/sonic_platform/event.py
index 73f9d4d8f10e..351b2a5ac087 100644
--- a/device/celestica/x86_64-cel_seastone-r0/sonic_platform/event.py
+++ b/device/celestica/x86_64-cel_seastone-r0/sonic_platform/event.py
@@ -1,6 +1,6 @@
 try:
     import select
-    from helper import APIHelper
+    from .helper import APIHelper
     from sonic_py_common.logger import Logger
 except ImportError as e:
     raise ImportError(repr(e) + " - required module not found")