diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index dc9d9ec..b6a48dd 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -230,7 +230,9 @@
  *	and optionally a MAC (as BSSID) and FREQ_FIXED attribute if those
  *	should be fixed rather than automatically determined. Can only be
  *	executed on a network interface that is UP, and fixed BSSID/FREQ
- *	may be rejected.
+ *	may be rejected. Another optional parameter is the beacon interval,
+ *	given in the %NL80211_ATTR_BEACON_INTERVAL attribute, which if not
+ *	given defaults to 100 TU (102.4ms).
  * @NL80211_CMD_LEAVE_IBSS: Leave the IBSS -- no special arguments, the IBSS is
  *	determined by the network interface.
  *
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 54bc69c..7f7b53b 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -733,6 +733,7 @@
  *	IBSSs to join on other channels.
  * @ie: information element(s) to include in the beacon
  * @ie_len: length of that
+ * @beacon_interval: beacon interval to use
  */
 struct cfg80211_ibss_params {
 	u8 *ssid;
@@ -740,6 +741,7 @@
 	struct ieee80211_channel *channel;
 	u8 *ie;
 	u8 ssid_len, ie_len;
+	u16 beacon_interval;
 	bool channel_fixed;
 };