diff --git a/subsys/bluetooth/mesh/cfg_srv.c b/subsys/bluetooth/mesh/cfg_srv.c
index 20365f0194b..884906695b5 100644
--- a/subsys/bluetooth/mesh/cfg_srv.c
+++ b/subsys/bluetooth/mesh/cfg_srv.c
@@ -50,7 +50,7 @@ static int comp_add_elem(struct net_buf_simple *buf, struct bt_mesh_elem *elem,
 	int i;
 
 	if (net_buf_simple_tailroom(buf) <
-	    4 + (elem->model_count * 2U) + (elem->vnd_model_count * 2U)) {
+	    4 + (elem->model_count * 2U) + (elem->vnd_model_count * 4U)) {
 		BT_ERR("Too large device composition");
 		return -E2BIG;
 	}