diff --git a/Apollonius_graph_2/changes.txt b/Apollonius_graph_2/changes.txt
index f772d1e9858..4393f11882c 100644
--- a/Apollonius_graph_2/changes.txt
+++ b/Apollonius_graph_2/changes.txt
@@ -1,3 +1,8 @@
+2 May 2006:  Menelaos Karavelas
+- fixed bug in drawing routine of Parabola_segment_2; in somes cases
+  the drawing routine was producing some points twice. Thanks to 
+  Rafael Torres <rtorres@dimm.upv.es> for spotting the bug.
+
 1 May 2006:  Menelaos Karavelas
 - fixed bug introduced in compute_points() in Parabola_2 class during
   the changes of March 9, 2006. Drawing of parabolas or parabolic arcs
diff --git a/Apollonius_graph_2/include/CGAL/Parabola_segment_2.h b/Apollonius_graph_2/include/CGAL/Parabola_segment_2.h
index bcdcc746006..0b158488475 100644
--- a/Apollonius_graph_2/include/CGAL/Parabola_segment_2.h
+++ b/Apollonius_graph_2/include/CGAL/Parabola_segment_2.h
@@ -83,7 +83,7 @@ public:
       int k;
 
       p.push_back( this->o );
-      k = 1;
+      k = -1;
       tt = -this->STEP();
       while ( CGAL::compare(tt, s0) == LARGER ) {
 	p.insert( p.begin(), f(tt) );