diff --git a/lib/parameter.c b/lib/parameter.c
index 9f96d07..65d6c7c 100644
--- a/lib/parameter.c
+++ b/lib/parameter.c
@@ -692,7 +692,7 @@
 
 	piro = xzalloc(sizeof(*piro));
 
-	ret = __dev_add_param(&piro->param, dev, name, NULL, NULL, 0);
+	ret = __dev_add_param(&piro->param, dev, name, NULL, NULL, PARAM_FLAG_RO);
 	if (ret) {
 		free(piro);
 		return ERR_PTR(ret);
@@ -718,7 +718,7 @@
 
 	piro = xzalloc(sizeof(*piro));
 
-	ret = __dev_add_param(&piro->param, dev, name, NULL, NULL, 0);
+	ret = __dev_add_param(&piro->param, dev, name, NULL, NULL, PARAM_FLAG_RO);
 	if (ret) {
 		free(piro);
 		return ERR_PTR(ret);