diff --git a/Surface_mesh_simplification/doc_tex/Surface_mesh_simplification_ref/edge_collapse.tex b/Surface_mesh_simplification/doc_tex/Surface_mesh_simplification_ref/edge_collapse.tex
index a67df7b1c86..d26362b05df 100644
--- a/Surface_mesh_simplification/doc_tex/Surface_mesh_simplification_ref/edge_collapse.tex
+++ b/Surface_mesh_simplification/doc_tex/Surface_mesh_simplification_ref/edge_collapse.tex
@@ -78,7 +78,7 @@ Maps each vertex in the surface into an unsigned integer number
 in the range \ccc{[0,num_vertices(surface))}.
 
 \ccc{VertexIndexMap} must be a
-\ccAnchor{http://www.boost.org/libs/property_map/ReadablePropertyMap.html}{ReadablePropertyMap} 
+\ccAnchor{http://www.boost.org/libs/property_map/doc/ReadablePropertyMap.html}{ReadablePropertyMap} 
 whose \ccc{key_type} is
 \ccc{boost::graph_traits<EdgeCollapsableMesh const>::vertex_descriptor}
 and whose \ccc{value_type} is