diff --git a/packages/platforms/accton/x86-64/x86-64-accton-as7816-64x/onlp/builds/src/module/src/platform_lib.c b/packages/platforms/accton/x86-64/x86-64-accton-as7816-64x/onlp/builds/src/module/src/platform_lib.c
index 015bf647..d589fa93 100644
--- a/packages/platforms/accton/x86-64/x86-64-accton-as7816-64x/onlp/builds/src/module/src/platform_lib.c
+++ b/packages/platforms/accton/x86-64/x86-64-accton-as7816-64x/onlp/builds/src/module/src/platform_lib.c
@@ -30,7 +30,7 @@
 #include "platform_lib.h"
 
 #define PSU_MODEL_NAME_LEN 		8
-#define PSU_SERIAL_NUMBER_LEN	14
+#define PSU_SERIAL_NUMBER_LEN	18
 #define PSU_NODE_MAX_PATH_LEN   64
 
 int psu_serial_number_get(int id, char *serial, int serial_len)