diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 4a6b5e40e5e4cc..c889a879854d83 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4513,6 +4513,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn,
 		}
 		goto done;
 
+	case L2CAP_CONF_UNKNOWN:
 	case L2CAP_CONF_UNACCEPT:
 		if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
 			char req[64];