diff --git a/lib/mgmt.h b/lib/mgmt.h
index 7520c7a..e46e08b 100644
--- a/lib/mgmt.h
+++ b/lib/mgmt.h
@@ -586,6 +586,12 @@ struct mgmt_cp_set_phy_confguration {
 
 #define MGMT_OP_SET_BLOCKED_KEYS	0x0046
 
+#define MGMT_OP_READ_SECURITY_INFO	0x0048
+struct mgmt_rp_read_security_info {
+	uint16_t sec_len;
+	uint8_t  sec[0];
+} __packed;
+
 #define HCI_BLOCKED_KEY_TYPE_LINKKEY	0x00
 #define HCI_BLOCKED_KEY_TYPE_LTK		0x01
 #define HCI_BLOCKED_KEY_TYPE_IRK		0x02
@@ -898,6 +904,7 @@ static const char *mgmt_op[] = {
 	"Set PHY Configuration",
 	"Set Blocked Keys",
 	"Set Wideband Speech",
+	"Read Security Information",
 };
 
 static const char *mgmt_ev[] = {