diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index 4e47cd558b26..ac9327e846db 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -1065,7 +1065,7 @@ setifmtu(const char *val, int dummy __unused, int s,
 #define	IFFBITS \
 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
-"\20MULTICAST"
+"\20MULTICAST\023MONITOR"
 
 #define	IFCAPBITS \
 "\003\1rxcsum\2txcsum\3netcons"