diff --git a/newlib/libc/sys/rtems/include/net/if.h b/newlib/libc/sys/rtems/include/net/if.h
index 512a926aa..2c1ecdf32 100644
--- a/newlib/libc/sys/rtems/include/net/if.h
+++ b/newlib/libc/sys/rtems/include/net/if.h
@@ -144,7 +144,7 @@ struct if_data {
 #define	IFF_DEBUG	0x4		/* (n) turn on debugging */
 #define	IFF_LOOPBACK	0x8		/* (i) is a loopback net */
 #define	IFF_POINTOPOINT	0x10		/* (i) is a point-to-point link */
-/*			0x20		   was IFF_SMART */
+#define	IFF_NEEDSEPOCH	0x20		/* (i) calls if_input w/o epoch */
 #define	IFF_DRV_RUNNING	0x40		/* (d) resources allocated */
 #define	IFF_NOARP	0x80		/* (n) no address resolution protocol */
 #define	IFF_PROMISC	0x100		/* (n) receive all packets */