diff --git a/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/arch/lwipopts.h b/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/arch/lwipopts.h
index ee9a40abc..72106e022 100644
--- a/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/arch/lwipopts.h
+++ b/Ubiquitous/XiZi_IIoT/resources/ethernet/LwIP/arch/lwipopts.h
@@ -412,7 +412,7 @@ The STM32F4x7 allows computing and verifying the IP, UDP, TCP and ICMP checksums
  - To use this feature let the following define uncommented.
  - To disable it and process by CPU comment the  the checksum.
 */
-// #define CHECKSUM_BY_HARDWARE
+#define CHECKSUM_BY_HARDWARE
 
 #ifdef CHECKSUM_BY_HARDWARE
 /* CHECKSUM_GEN_IP==0: Generate checksums by hardware for outgoing IP packets.*/