diff --git a/include/hci.h b/include/hci.h
index e7f0459..5e874e0 100644
--- a/include/hci.h
+++ b/include/hci.h
@@ -267,6 +267,7 @@
 #define HCI_LM_ENCRYPT	0x0004
 #define HCI_LM_TRUSTED	0x0008
 #define HCI_LM_RELIABLE	0x0010
+#define HCI_LM_SECURE	0x0020
 
 /* -----  HCI Commands ----- */
 
diff --git a/include/l2cap.h b/include/l2cap.h
index e76f902..025d0f6 100644
--- a/include/l2cap.h
+++ b/include/l2cap.h
@@ -67,6 +67,7 @@
 #define L2CAP_LM_ENCRYPT	0x0004
 #define L2CAP_LM_TRUSTED	0x0008
 #define L2CAP_LM_RELIABLE	0x0010
+#define L2CAP_LM_SECURE		0x0020
 
 #define L2CAP_QOS	0x04
 struct l2cap_qos {
diff --git a/include/rfcomm.h b/include/rfcomm.h
index 8cb8ac4..02775d5 100644
--- a/include/rfcomm.h
+++ b/include/rfcomm.h
@@ -56,6 +56,7 @@
 #define RFCOMM_LM_ENCRYPT	0x0004
 #define RFCOMM_LM_TRUSTED	0x0008
 #define RFCOMM_LM_RELIABLE	0x0010
+#define RFCOMM_LM_SECURE	0x0020
 
 /* RFCOMM TTY support */
 #define RFCOMM_MAX_DEV	256