From 4bb220bb90f6c1a895b4f05fb92b5b74030f04f9 Mon Sep 17 00:00:00 2001
From: Fangjun Kuang <csukuangfj@gmail.com>
Date: Sat, 2 Jun 2018 16:17:32 +0800
Subject: [PATCH] fix #11668.

---
 modules/viz/include/opencv2/viz/widgets.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/viz/include/opencv2/viz/widgets.hpp b/modules/viz/include/opencv2/viz/widgets.hpp
index dcc1165660..cdfe20800f 100644
--- a/modules/viz/include/opencv2/viz/widgets.hpp
+++ b/modules/viz/include/opencv2/viz/widgets.hpp
@@ -95,7 +95,7 @@ namespace cv
             Widget();
             Widget(const Widget& other);
             Widget& operator=(const Widget& other);
-            ~Widget();
+            virtual ~Widget();
 
             /** @brief Creates a widget from ply file.