diff --git a/device/celestica/x86_64-cel_e1031-r0/sonic_platform/common.py b/device/celestica/x86_64-cel_e1031-r0/sonic_platform/common.py
index 0838f0cf0a..0dcbf7f33d 100644
--- a/device/celestica/x86_64-cel_e1031-r0/sonic_platform/common.py
+++ b/device/celestica/x86_64-cel_e1031-r0/sonic_platform/common.py
@@ -183,7 +183,7 @@ class Common:
             return False
         return True
 
-    def is_host():
+    def is_host(self):
         """
         Test whether current process is running on the host or an docker
         return True for host and False for docker