diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index 58d7f36949da..be41f1cc10ee 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -29,6 +29,7 @@
 #include <linux/igmp.h>
 #include <net/tcp.h>
 #include <net/udp.h>
+#include <net/ip6_checksum.h>
 
 #include <net/act_api.h>