diff --git a/Apollonius_graph_2/description.txt b/Apollonius_graph_2/description.txt
index 0aa55abf3d7..a28ce71c2fe 100644
--- a/Apollonius_graph_2/description.txt
+++ b/Apollonius_graph_2/description.txt
@@ -1,3 +1,3 @@
 This package offers a dynamic algorithm for the construction of the
-Apollonius diagram in 2D (also known as the Additively weighted
-Voronoi diagram).
\ No newline at end of file
+Apollonius graph in 2D which is the dual of the Apollonius diagram
+(also known as the Additively weighted Voronoi diagram).