diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/HDT2.cpp b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/HDT2.cpp
index 60c40cca792..be289b362b6 100644
--- a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/HDT2.cpp
+++ b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/HDT2.cpp
@@ -216,7 +216,7 @@ MainWindow::MainWindow()
this->setupStatusBar();
this->setupOptionsMenu();
- this->addAboutDemo(":/cgal/help/about_Delaunay_triangulation_2.html");
+ this->addAboutDemo(":/cgal/help/about_Hyperbolic_Delaunay_triangulation_2.html");
this->addAboutCGAL();
this->addRecentFiles(this->menuFile, this->actionQuit);
diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/Delaunay_triangulation_2.qrc b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/Delaunay_triangulation_2.qrc
index b1fa77544ef..963627cc482 100644
--- a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/Delaunay_triangulation_2.qrc
+++ b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/Delaunay_triangulation_2.qrc
@@ -7,6 +7,6 @@
../resources/about_CGAL.html
- about_Delaunay_triangulation_2.html
+ about_Hyperbolic_Delaunay_triangulation_2.html
diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Delaunay_triangulation_2.html b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Delaunay_triangulation_2.html
deleted file mode 100644
index cee38a7e5cd..00000000000
--- a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Delaunay_triangulation_2.html
+++ /dev/null
@@ -1,11 +0,0 @@
-
-
- Delaunay Triangulation
- Copyright © 2008 GeometryFactory
- This application illustrates the 2D Delaunay triangulation
- of CGAL, and its dual Voronoi
- diagram.
- See also the online
- manual.
-
-
diff --git a/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Hyperbolic_Delaunay_triangulation_2.html b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Hyperbolic_Delaunay_triangulation_2.html
new file mode 100644
index 00000000000..9bb6671e5b3
--- /dev/null
+++ b/Hyperbolic_triangulation_2/demo/Hyperbolic_triangulation_2/resources/about_Hyperbolic_Delaunay_triangulation_2.html
@@ -0,0 +1,10 @@
+
+
+ Hyperbolic Delaunay Triangulation
+ Copyright © 2019 GeometryFactory
+ This application illustrates the 2D Hyperbolic Delaunay Triangulation
+ of CGAL, and the dual objects of its faces and edges.
+ See also the online
+ manual.
+
+