diff --git a/include/linux/in_route.h b/include/linux/in_route.h
index 61f25c3..b261b8c 100644
--- a/include/linux/in_route.h
+++ b/include/linux/in_route.h
@@ -10,19 +10,19 @@
 #define RTCF_NOPMTUDISC RTM_F_NOPMTUDISC
 
 #define RTCF_NOTIFY	0x00010000
-#define RTCF_DIRECTDST	0x00020000
+#define RTCF_DIRECTDST	0x00020000 /* unused */
 #define RTCF_REDIRECTED	0x00040000
-#define RTCF_TPROXY	0x00080000
+#define RTCF_TPROXY	0x00080000 /* unused */
 
-#define RTCF_FAST	0x00200000
-#define RTCF_MASQ	0x00400000
-#define RTCF_SNAT	0x00800000
+#define RTCF_FAST	0x00200000 /* unused */
+#define RTCF_MASQ	0x00400000 /* unused */
+#define RTCF_SNAT	0x00800000 /* unused */
 #define RTCF_DOREDIRECT 0x01000000
 #define RTCF_DIRECTSRC	0x04000000
 #define RTCF_DNAT	0x08000000
 #define RTCF_BROADCAST	0x10000000
 #define RTCF_MULTICAST	0x20000000
-#define RTCF_REJECT	0x40000000
+#define RTCF_REJECT	0x40000000 /* unused */
 #define RTCF_LOCAL	0x80000000
 
 #define RTCF_NAT	(RTCF_DNAT|RTCF_SNAT)