diff --git a/research/libwifi/wifi.py b/research/libwifi/wifi.py
index 7fa3e0338..9df4aacaf 100644
--- a/research/libwifi/wifi.py
+++ b/research/libwifi/wifi.py
@@ -146,6 +146,15 @@ def is_amsdu(p):
 	else:
 		return p.Reserved == 1
 
+def remove_dot11qos(p):
+	if not Dot11QoS in p: return
+	p = p.copy()
+	payload = p[Dot11QoS].payload
+	p.remove_payload()
+	p /= payload
+	p.subtype = 0
+	return p
+
 #### Packet Processing Functions ####
 
 class DHCP_sock(DHCP_am):