diff --git a/include/btstack/hci_cmds.h b/include/btstack/hci_cmds.h
index fc27800ea..90ddda766 100644
--- a/include/btstack/hci_cmds.h
+++ b/include/btstack/hci_cmds.h
@@ -128,7 +128,7 @@ extern "C" {
 
 // L2CAP EVENTS
 	
-// data: event (8), len(8), status (8), address(48), handle (16), psm (16), local_cid(16), remote_cid (16) 
+// data: event (8), len(8), status (8), address(48), handle (16), psm (16), local_cid(16), remote_cid (16), local_mtu(16), remote_mtu(16) 
 #define L2CAP_EVENT_CHANNEL_OPENED                         0x70
 
 // data: event (8), len(8), channel (16)
diff --git a/src/l2cap.c b/src/l2cap.c
index f0f1bee91..61682c52e 100644
--- a/src/l2cap.c
+++ b/src/l2cap.c
@@ -109,6 +109,8 @@ void l2cap_emit_channel_opened(l2cap_channel_t *channel, uint8_t status) {
     bt_store_16(event, 11, channel->psm);
     bt_store_16(event, 13, channel->local_cid);
     bt_store_16(event, 15, channel->remote_cid);
+    bt_store_16(event, 17, channel->local_mtu);
+    bt_store_16(event, 19, channel->remote_mtu); 
     hci_dump_packet( HCI_EVENT_PACKET, 0, event, sizeof(event));
     l2cap_dispatch(channel, HCI_EVENT_PACKET, event, sizeof(event));
 }