diff --git a/GUI/aliza.cpp b/GUI/aliza.cpp
index 91d8192..0f88c0d 100644
--- a/GUI/aliza.cpp
+++ b/GUI/aliza.cpp
@@ -901,12 +901,6 @@ void Aliza::add_histogram(ImageVariant * v, QProgressDialog * pb, bool check_set
 	while (!t->isFinished())
 	{
 		delay1(100);
-		if (pb && pb->wasCanceled())
-		{
-			t->exit(0);
-			lock0 = false;
-			exit(0);
-		}
 	}
 	t->gen_pixmap();
 	const QString tmp0 = t->get_error();
diff --git a/GUI/mainwindow.cpp b/GUI/mainwindow.cpp
index 9208708..350a634 100644
--- a/GUI/mainwindow.cpp
+++ b/GUI/mainwindow.cpp
@@ -1494,7 +1494,7 @@ void MainWindow::dropEvent(QDropEvent * e)
 			}
 			if (dcm_thread)
 			{
-				disconnect(pb,SIGNAL(canceled()),this,SLOT(exit_null()));
+				disconnect(pb, SIGNAL(canceled()), this, SLOT(exit_null()));
 			}
 			pb->close();
 			delete pb;
@@ -1587,7 +1587,7 @@ void MainWindow::load_any()
 	l.clear();
 	if (dcm_thread)
 	{
-		disconnect(pb,SIGNAL(canceled()),this,SLOT(exit_null()));
+		disconnect(pb, SIGNAL(canceled()), this, SLOT(exit_null()));
 	}
 	pb->close();
 	delete pb;