From 45a5487e51e7ee451cba7140524a0d4a659c559c Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Fri, 5 Jul 2019 20:09:30 +0200
Subject: [PATCH] Fix of compilation on clang

---
 src/slic3r/Utils/UndoRedo.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/Utils/UndoRedo.hpp b/src/slic3r/Utils/UndoRedo.hpp
index 178e5a11a0..f8bfda08cf 100644
--- a/src/slic3r/Utils/UndoRedo.hpp
+++ b/src/slic3r/Utils/UndoRedo.hpp
@@ -5,6 +5,7 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <cassert>
 
 #include <libslic3r/ObjectID.hpp>