diff --git a/Cone_spanners_2/doc/Cone_spanners_2/PackageDescription.txt b/Cone_spanners_2/doc/Cone_spanners_2/PackageDescription.txt
index b6515fa60ed..c01f66ffc3d 100644
--- a/Cone_spanners_2/doc/Cone_spanners_2/PackageDescription.txt
+++ b/Cone_spanners_2/doc/Cone_spanners_2/PackageDescription.txt
@@ -12,8 +12,9 @@
 \cgalPkgSummaryBegin
 \cgalPkgAuthors{Weisheng Si and Quincy Tse}
 \cgalPkgDesc{This package provides functors for constructing two kinds of cone-based spanners: 
-Yao graph and Theta graph, given a set of vertices on the plane. Both exact and inexact constructions are 
-supported. In exact construction, the cone boundaries are calculated using the roots of polynomials, 
+Yao graph and Theta graph, given a set of vertices on the plane and the directions of cone boundaries. 
+Both exact and inexact constructions are supported. 
+In exact construction, the cone boundaries are calculated using the roots of polynomials, 
 thus avoiding the use of \f$ \pi \f$, which cannot be represented exactly. 
 In inexact construction, the cone boundaries are calculated using the approximate \f$ \pi \f$
 value defined in \cgal, which is still accurate enough for most applications.