From 168378e55eeecf7edac5268a867c7ab1ff07483a Mon Sep 17 00:00:00 2001
From: Fabien Spindler <Fabien.Spindler@inria.fr>
Date: Sun, 4 Feb 2024 09:43:23 +0100
Subject: [PATCH] Add missing optional header

---
 modules/tracker/me/include/visp3/me/vpMeEllipse.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/tracker/me/include/visp3/me/vpMeEllipse.h b/modules/tracker/me/include/visp3/me/vpMeEllipse.h
index 343858a274..a70017936a 100644
--- a/modules/tracker/me/include/visp3/me/vpMeEllipse.h
+++ b/modules/tracker/me/include/visp3/me/vpMeEllipse.h
@@ -49,6 +49,10 @@
 #include <list>
 #include <math.h>
 
+#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_17)
+#include <optional>
+#endif
+
 /*!
  * \class vpMeEllipse
  * \ingroup module_me