diff --git a/contrib/tcpdump/ieee802_11_radio.h b/contrib/tcpdump/ieee802_11_radio.h
index bbbd19922b69..472a0d982b1c 100644
--- a/contrib/tcpdump/ieee802_11_radio.h
+++ b/contrib/tcpdump/ieee802_11_radio.h
@@ -193,7 +193,7 @@ enum ieee80211_radiotap_type {
 	IEEE80211_RADIOTAP_ANTENNA = 11,
 	IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
 	IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
-	IEEE80211_RADIOTAP_XCHANNEL = 14,
+	IEEE80211_RADIOTAP_XCHANNEL = 18,
 	IEEE80211_RADIOTAP_EXT = 31
 };