diff --git a/src/error.c b/src/error.c
index 29c0710..f179e6c 100644
--- a/src/error.c
+++ b/src/error.c
@@ -171,6 +171,8 @@ const char *btd_error_bredr_conn_from_errno(int errno_code)
 		return ERR_BREDR_CONN_ABORT_BY_LOCAL;
 	case EPROTO:
 		return ERR_BREDR_CONN_LMP_PROTO_ERROR;
+	case EBADE:
+		return ERR_BREDR_CONN_KEY_MISSING;
 	default:
 		return ERR_BREDR_CONN_UNKNOWN;
 	}
@@ -209,6 +211,8 @@ const char *btd_error_le_conn_from_errno(int errno_code)
 		return ERR_LE_CONN_ABORT_BY_LOCAL;
 	case EPROTO:
 		return ERR_LE_CONN_LL_PROTO_ERROR;
+	case EBADE:
+		return ERR_LE_CONN_KEY_MISSING;
 	default:
 		return ERR_LE_CONN_UNKNOWN;
 	}
diff --git a/src/error.h b/src/error.h
index cc7790a..83206cb 100644
--- a/src/error.h
+++ b/src/error.h
@@ -43,6 +43,7 @@
 #define ERR_BREDR_CONN_LMP_PROTO_ERROR		"br-connection-lmp-protocol-"\
 						"error"
 #define ERR_BREDR_CONN_CANCELED			"br-connection-canceled"
+#define ERR_BREDR_CONN_KEY_MISSING		"br-connection-key-missing"
 #define ERR_BREDR_CONN_UNKNOWN			"br-connection-unknown"
 
 /* LE connection failure reasons */
@@ -63,6 +64,7 @@
 #define ERR_LE_CONN_LL_PROTO_ERROR	"le-connection-link-layer-protocol-"\
 					"error"
 #define ERR_LE_CONN_GATT_BROWSE		"le-connection-gatt-browsing"
+#define ERR_LE_CONN_KEY_MISSING		"le-connection-key-missing"
 #define ERR_LE_CONN_UNKNOWN		"le-connection-unknown"
 
 DBusMessage *btd_error_invalid_args(DBusMessage *msg);