diff --git a/platform/broadcom/sonic-platform-modules-accton/as9736-64d/sonic_platform/event.py b/platform/broadcom/sonic-platform-modules-accton/as9736-64d/sonic_platform/event.py
index fb28c38839a2..633a65be1c5b 100644
--- a/platform/broadcom/sonic-platform-modules-accton/as9736-64d/sonic_platform/event.py
+++ b/platform/broadcom/sonic-platform-modules-accton/as9736-64d/sonic_platform/event.py
@@ -53,7 +53,7 @@ def get_sfp_event(self, timeout=2000):
                     port_dict[i+1] = '0'
                 else:
                     # clear bitmap if refresh_optoe_dev_class() failed
-                    if sfp._refresh_optoe_dev_class() is False:
+                    if sfp.refresh_optoe_dev_class() is False:
                         bitmap = bitmap & ~(1 << i)
                         continue