diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 6ec12bd..bd72f59 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -457,6 +457,8 @@
 /**
  * enum ieee80211_if_types - types of 802.11 network interfaces
  *
+ * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used
+ *	by mac80211 itself
  * @IEEE80211_IF_TYPE_AP: interface in AP mode.
  * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
  *	daemon. Drivers should never see this type.
@@ -468,6 +470,7 @@
  *	will never see this type.
  */
 enum ieee80211_if_types {
+	IEEE80211_IF_TYPE_INVALID,
 	IEEE80211_IF_TYPE_AP,
 	IEEE80211_IF_TYPE_MGMT,
 	IEEE80211_IF_TYPE_STA,