From 7e12992ee07414b7b92ac11b1747f28bc5f59ece Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Mon, 15 Jun 2020 17:12:04 +0200
Subject: [PATCH] Missing #include

---
 .../internal/Smoothing/curvature_flow_impl.h                     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Smoothing/curvature_flow_impl.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Smoothing/curvature_flow_impl.h
index a201c6e8dde..0c9e2d9fa0e 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Smoothing/curvature_flow_impl.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Smoothing/curvature_flow_impl.h
@@ -35,6 +35,7 @@
 #include <iostream>
 #include <utility>
 #include <vector>
+#include <unordered_map>
 
 namespace CGAL {
 namespace Polygon_mesh_processing {