diff --git a/sys/net80211/_ieee80211.h b/sys/net80211/_ieee80211.h
index 3793c661f86..5120d413188 100644
--- a/sys/net80211/_ieee80211.h
+++ b/sys/net80211/_ieee80211.h
@@ -242,6 +242,8 @@ struct ieee80211_channel {
 	(((_c)->ic_flags & (IEEE80211_CHAN_OFDM | IEEE80211_CHAN_DYN)) != 0)
 #define	IEEE80211_IS_CHAN_CCK(_c) \
 	(((_c)->ic_flags & (IEEE80211_CHAN_CCK | IEEE80211_CHAN_DYN)) != 0)
+#define	IEEE80211_IS_CHAN_DYN(_c) \
+	(((_c)->ic_flags & IEEE80211_CHAN_DYN) == IEEE80211_CHAN_DYN)
 #define	IEEE80211_IS_CHAN_GFSK(_c) \
 	(((_c)->ic_flags & IEEE80211_CHAN_GFSK) != 0)
 #define	IEEE80211_IS_CHAN_TURBO(_c) \