diff --git a/include/uapi/linux/mroute6.h b/include/uapi/linux/mroute6.h
index ce91215cf7e62..e0b566dc72ef7 100644
--- a/include/uapi/linux/mroute6.h
+++ b/include/uapi/linux/mroute6.h
@@ -3,6 +3,7 @@
 
 #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