diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 5f34935..cde7ede 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -154,6 +154,10 @@
    802.11e clarifies the figure in section 7.1.2. The frame body is
    up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
 #define IEEE80211_MAX_DATA_LEN		2304
+/* 802.11ad extends maximum MSDU size for DMG (freq > 40Ghz) networks
+ * to 7920 bytes, see 8.2.3 General frame format
+ */
+#define IEEE80211_MAX_DATA_LEN_DMG	7920
 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
 #define IEEE80211_MAX_FRAME_LEN		2352