diff --git a/device/accton/x86_64-accton_as4630_54npe-r0/sonic_platform/thermal.py b/device/accton/x86_64-accton_as4630_54npe-r0/sonic_platform/thermal.py
index da5c7ecf10bf..9005c491363b 100644
--- a/device/accton/x86_64-accton_as4630_54npe-r0/sonic_platform/thermal.py
+++ b/device/accton/x86_64-accton_as4630_54npe-r0/sonic_platform/thermal.py
@@ -416,7 +416,7 @@ def get_maximum_recorded(self):
             A float number, the maximum recorded temperature of thermal in Celsius
             up to nearest thousandth of one degree Celsius, e.g. 30.125
         """
-        if self.min_temperature is None:
+        if self.max_temperature is None:
             self.get_temperature()
 
         return self.max_temperature