diff -r c35afa9e89e7 -r ef88c0a30f85 demo/graph_to_eps_demo.cc
--- a/demo/graph_to_eps_demo.cc	Mon Jan 12 23:11:39 2009 +0100
+++ b/demo/graph_to_eps_demo.cc	Thu Nov 05 15:48:01 2009 +0100
@@ -182,7 +182,7 @@
   ListDigraph::NodeMap<int> hcolors(h);
   ListDigraph::NodeMap<Point> hcoords(h);
 
-  int cols=int(sqrt(double(palette.size())));
+  int cols=int(std::sqrt(double(palette.size())));
   for(int i=0;i<int(paletteW.size());i++) {
     Node n=h.addNode();
     hcoords[n]=Point(1+i%cols,1+i/cols);