diff --git a/include/uapi/linux/mroute6.h b/include/uapi/linux/mroute6.h
index 5062fb5751e1882a509170c2b88278ca3c26f5a2..ed5721148768906125aa4cc14c4d2b51c21d411b 100644
--- a/include/uapi/linux/mroute6.h
+++ b/include/uapi/linux/mroute6.h
@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/sockios.h>
+#include <linux/in6.h>		/* For struct sockaddr_in6. */
 
 /*
  *	Based on the MROUTING 3.5 defines primarily to keep