From 9c35e0cb75cdf09f29b66573973738ef0669e7e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Fri, 12 Nov 2021 13:29:17 +0100
Subject: [PATCH] Added a missing include (GCC 11.1).

---
 src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp b/src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp
index e6367ee27..a2f819387 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp
@@ -7,6 +7,7 @@
 #include "slic3r/GUI/3DScene.hpp"
 #include "admesh/stl.h" // indexed_triangle_set
 #include <mutex>
+#include <thread>
 
 namespace Slic3r {
 class ModelVolume;