diff --git a/platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py b/platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py
index 17d66b2e8f6..d72ea333cc6 100644
--- a/platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py
+++ b/platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py
@@ -735,7 +735,6 @@ def initialize_reboot_cause(self):
             'reset_hotswap_or_halt'     :   self.REBOOT_CAUSE_HARDWARE_OTHER,
             'reset_voltmon_upgrade_fail':   self.REBOOT_CAUSE_HARDWARE_OTHER,
             'reset_reload_bios'         :   self.REBOOT_CAUSE_HARDWARE_BIOS,
-            'reset_from_comex'          :   self.REBOOT_CAUSE_HARDWARE_CPU,
             'reset_fw_reset'            :   self.REBOOT_CAUSE_HARDWARE_RESET_FROM_ASIC,
             'reset_from_asic'           :   self.REBOOT_CAUSE_HARDWARE_RESET_FROM_ASIC,
             'reset_long_pb'             :   self.REBOOT_CAUSE_HARDWARE_BUTTON,