From 5244c444206bca10b502c9c8fc15734841ade5e9 Mon Sep 17 00:00:00 2001
From: Hombre <natureh.510@gmail.com>
Date: Tue, 18 Oct 2016 23:18:45 +0200
Subject: [PATCH] Solving issue #3297

---
 rtgui/histogrampanel.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rtgui/histogrampanel.cc b/rtgui/histogrampanel.cc
index 3c784a96b..98651ca0d 100644
--- a/rtgui/histogrampanel.cc
+++ b/rtgui/histogrampanel.cc
@@ -908,6 +908,7 @@ int histupdateUI (void* data)
         return 0;
     }
 
+    haih->harea->setDirty (true);
     haih->harea->updateBackBuffer ();
     haih->harea->queue_draw ();