diff --git a/AABB_tree/demo/AABB_tree/Viewer.h b/AABB_tree/demo/AABB_tree/Viewer.h
index 5361bc12e99..7e99e5c9e84 100644
--- a/AABB_tree/demo/AABB_tree/Viewer.h
+++ b/AABB_tree/demo/AABB_tree/Viewer.h
@@ -1,6 +1,6 @@
 #ifndef VIEWER_H
 #define VIEWER_H
-
+#include <QMap>
 #include <QGLViewer/qglviewer.h>
 
 
diff --git a/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/MainWindow.cpp b/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/MainWindow.cpp
index 6baee676251..9faad58a0da 100644
--- a/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/MainWindow.cpp
+++ b/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/MainWindow.cpp
@@ -150,7 +150,11 @@ MainWindow::savePoints()
 
 void MainWindow::lloydStep() {
   scene.lloyd_step();
+#if QGLVIEWER_VERSION >= 0x020700
+  viewer->update();
+#else
   viewer->updateGL();
+#endif
   viewer->changed();
   }
 
diff --git a/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/Viewer.h b/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/Viewer.h
index c03df5c5c65..b794e34a306 100644
--- a/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/Viewer.h
+++ b/Periodic_3_triangulation_3/demo/Periodic_Lloyd_3/Viewer.h
@@ -2,6 +2,7 @@
 #define VIEWER_H
 
 #include "Scene.h"
+#include <QMap>
 #include <QGLViewer/qglviewer.h>
 #include <QOpenGLFunctions_2_1>
 #include <QOpenGLVertexArrayObject>