diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index c9b0442..a851bf4 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -401,6 +401,8 @@
 	snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
 		 wiphy_name(local->hw.wiphy));
 
+	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+
 	ieee80211_set_default_queues(sdata);
 
 	ret = drv_add_interface(local, sdata);
@@ -1273,6 +1275,7 @@
 
 	sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
 	sdata->control_port_no_encrypt = false;
+	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
 
 	sdata->noack_map = 0;
 
@@ -1689,6 +1692,8 @@
 	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
 	sdata->user_power_level = local->user_power_level;
 
+	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+
 	/* setup type-dependent data */
 	ieee80211_setup_sdata(sdata, type);