diff --git a/core/rtw_br_ext.c b/core/rtw_br_ext.c
index f90f790..b1fc8aa 100644
--- a/core/rtw_br_ext.c
+++ b/core/rtw_br_ext.c
@@ -49,6 +49,7 @@
 #include <linux/icmpv6.h>
 #include <net/ndisc.h>
 #include <net/checksum.h>
+#include <net/ip6_checksum.h>
 #endif
 #endif