diff --git a/doc/app_notes/inject_80211.md b/doc/app_notes/inject_80211.md
index d2aca45..aa0a637 100644
--- a/doc/app_notes/inject_80211.md
+++ b/doc/app_notes/inject_80211.md
@@ -28,11 +28,11 @@ To customize the packet, following piece of the inject_80211.c needs to be chang
 /* IEEE80211 header */
 static const u8 ieee_hdr[] =
 {
-	0x08, 0x01, 0x00, 0x00,             // Frame Control, Duration/ID
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // Address 1
-	0x66, 0x55, 0x44, 0x33, 0x22, 0x11, // Address 2
-	0x66, 0x55, 0x44, 0x33, 0x22, 0x11, // Address 3
-	0x10, 0x86,                         // Sequence Control
+	0x08, 0x01, 0x00, 0x00,             // FC 0x0801. 0--subtype; 8--type&version; 01--toDS1 fromDS0 (data packet to DS)
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x11, // BSSID/MAC of AP
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x22, // Source address (STA)
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x33, // Destination address (another STA under the same AP)
+	0x10, 0x86,                         // 0--fragment number; 0x861=2145--sequence number
 };
 ```
 Note: The byte/bit order might not be intuitive when comparing with the standard.
diff --git a/user_space/inject_80211/inject_80211.c b/user_space/inject_80211/inject_80211.c
index c37f3b0..7609e36 100644
--- a/user_space/inject_80211/inject_80211.c
+++ b/user_space/inject_80211/inject_80211.c
@@ -60,11 +60,11 @@ static const u8 u8aRadiotapHeader[] =
 /* IEEE80211 header */
 static const u8 ieee_hdr[] =
 {
-	0x08, 0x01, 0x00, 0x00,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0x66, 0x55, 0x44, 0x33, 0x22, 0x11,
-	0x66, 0x55, 0x44, 0x33, 0x22, 0x11,
-	0x10, 0x86,
+	0x08, 0x01, 0x00, 0x00,             // FC 0x0801. 0--subtype; 8--type&version; 01--toDS1 fromDS0 (data packet to DS)
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x11, // BSSID/MAC of AP
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x22, // Source address (STA)
+	0x66, 0x55, 0x44, 0x33, 0x22, 0x33, // Destination address (another STA under the same AP)
+	0x10, 0x86,                         // 0--fragment number; 0x861=2145--sequence number
 };
 
 // Generate random string