From 30a1e07a25dd2bd4c4113d805df5bbc394e7a201 Mon Sep 17 00:00:00 2001
From: Hleb Valoshka <375gnu@gmail.com>
Date: Tue, 10 Sep 2019 21:08:03 +0300
Subject: [PATCH] Include cstddef for NULL definition

---
 src/celengine/frametree.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/celengine/frametree.h b/src/celengine/frametree.h
index 2e1efa2c4..2e8eab23c 100644
--- a/src/celengine/frametree.h
+++ b/src/celengine/frametree.h
@@ -13,6 +13,7 @@
 #ifndef _CELENGINE_FRAMETREE_H_
 #define _CELENGINE_FRAMETREE_H_
 
+#include <cstddef>
 #include <vector>
 
 class Star;