diff --git a/tools/mesh-cfgclient.c b/tools/mesh-cfgclient.c
index 28465a6..1eeed2a 100644
--- a/tools/mesh-cfgclient.c
+++ b/tools/mesh-cfgclient.c
@@ -731,7 +731,7 @@ static void create_net_setup(struct l_dbus_message *msg, void *user_data)
 	struct l_dbus_message_builder *builder;
 
 	/* Generate random UUID */
-	l_getrandom(app.uuid, sizeof(app.uuid));
+	l_uuid_v4(app.uuid);
 
 	builder = l_dbus_message_builder_new(msg);
 
@@ -899,7 +899,7 @@ static void cmd_import_node(int argc, char *argv[])
 
 	/* Device UUID */
 	req->data1 = l_util_from_hexstring(argv[1], &sz);
-	if (!req->data1 || sz != 16) {
+	if (!req->data1 || sz != 16 || !l_uuid_is_valid(req->data1)) {
 		l_error("Failed to generate UUID array from %s", argv[1]);
 		goto fail;
 	}
@@ -1298,7 +1298,7 @@ static void add_node_setup(struct l_dbus_message *msg, void *user_data)
 	struct l_dbus_message_builder *builder;
 
 	uuid = l_util_from_hexstring(str, &sz);
-	if (!uuid || sz != 16) {
+	if (!uuid || sz != 16 || !l_uuid_is_valid(uuid)) {
 		l_error("Failed to generate UUID array from %s", str);
 		return;
 	}
diff --git a/tools/mesh/mesh-db.c b/tools/mesh/mesh-db.c
index d869130..46f0c60 100644
--- a/tools/mesh/mesh-db.c
+++ b/tools/mesh/mesh-db.c
@@ -1407,7 +1407,7 @@ bool mesh_db_create(const char *fname, const uint8_t token[8],
 	if (!add_u8_8(jcfg, "token", token))
 		goto fail;
 
-	l_getrandom(uuid, 16);
+	l_uuid_v4(uuid);
 
 	if (!add_u8_16(jcfg, "uuid", uuid))
 		goto fail;