diff --git a/Voronoi_diagram_2/changes.txt b/Voronoi_diagram_2/changes.txt
index fd841c50471..359b0bf9122 100644
--- a/Voronoi_diagram_2/changes.txt
+++ b/Voronoi_diagram_2/changes.txt
@@ -1,3 +1,6 @@
+27 May 2006:  Menelaos Karavelas
+- fixed errors introduced by the move of *.C to *_impl.h
+
 3 May 2006:  Menelaos Karavelas
 - fixed warning about missing virtual destructor of
   Virtual_Voronoi_diagram_2 class (in demo). Warning spotted by
diff --git a/Voronoi_diagram_2/demo/Voronoi_diagram_2/include/CGAL/IO/Qt_widget_Apollonius_diagram_halfedge_2.h b/Voronoi_diagram_2/demo/Voronoi_diagram_2/include/CGAL/IO/Qt_widget_Apollonius_diagram_halfedge_2.h
index befa669f03e..e840f5b2732 100644
--- a/Voronoi_diagram_2/demo/Voronoi_diagram_2/include/CGAL/IO/Qt_widget_Apollonius_diagram_halfedge_2.h
+++ b/Voronoi_diagram_2/demo/Voronoi_diagram_2/include/CGAL/IO/Qt_widget_Apollonius_diagram_halfedge_2.h
@@ -23,7 +23,7 @@
 #ifdef CGAL_USE_QT
 
 #include <CGAL/IO/Qt_widget.h>
-#include <CGAL/Apollonius_graph_constructions_C2.h>
+#include <CGAL/Apollonius_graph_2/Constructions_C2.h>
 #include <CGAL/Hyperbola_segment_2.h>
 #include <CGAL/Hyperbola_ray_2.h>
 #include <CGAL/Hyperbola_2.h>
diff --git a/Voronoi_diagram_2/include/CGAL/Voronoi_diagram_2/Apollonius_graph_nearest_site_2.h b/Voronoi_diagram_2/include/CGAL/Voronoi_diagram_2/Apollonius_graph_nearest_site_2.h
index 03962bc28af..3b6ce564584 100644
--- a/Voronoi_diagram_2/include/CGAL/Voronoi_diagram_2/Apollonius_graph_nearest_site_2.h
+++ b/Voronoi_diagram_2/include/CGAL/Voronoi_diagram_2/Apollonius_graph_nearest_site_2.h
@@ -22,7 +22,7 @@
 
 #include <CGAL/Voronoi_diagram_2/basic.h>
 #include <CGAL/Triangulation_utils_2.h>
-#include <CGAL/predicates/Ag2_orientation_2.h>
+#include <CGAL/Apollonius_graph_2/Orientation_2.h>
 
 #include <boost/variant.hpp>