diff --git a/Packages/Triangulation_2/doc_tex/Triangulation_2/triangulation_user.tex b/Packages/Triangulation_2/doc_tex/Triangulation_2/triangulation_user.tex
index f2c85665a83..83698022888 100644
--- a/Packages/Triangulation_2/doc_tex/Triangulation_2/triangulation_user.tex
+++ b/Packages/Triangulation_2/doc_tex/Triangulation_2/triangulation_user.tex
@@ -582,6 +582,7 @@ of these points.
 
 \subsection{Example : Voronoi Diagram}
 \label{Subsection_2D_Triangulations_Voronoi}
+\ccIndexMainItem{Voronoi diagram}
 The following code computes the edges of Voronoi diagram
 of a set of data points
 and counts  the number of finite edges and the number of rays
@@ -594,6 +595,7 @@ of this diagram
 
 \subsection{Description}
 \label{Subsection_2D_Triangulations_Regular_Description}
+\ccIndexMainItem{power diagram}
 Let ${  PW} = \{(p_i, w_i), i = 1, \ldots , n \}$ be a set of 
 weighted points where each $p_i$ is a point and each $w_i$
 is a scalar called the weight of point $p_i$.
diff --git a/Packages/Triangulation_2/doc_tex/basic/Triangulation_2/triangulation_user.tex b/Packages/Triangulation_2/doc_tex/basic/Triangulation_2/triangulation_user.tex
index f2c85665a83..83698022888 100644
--- a/Packages/Triangulation_2/doc_tex/basic/Triangulation_2/triangulation_user.tex
+++ b/Packages/Triangulation_2/doc_tex/basic/Triangulation_2/triangulation_user.tex
@@ -582,6 +582,7 @@ of these points.
 
 \subsection{Example : Voronoi Diagram}
 \label{Subsection_2D_Triangulations_Voronoi}
+\ccIndexMainItem{Voronoi diagram}
 The following code computes the edges of Voronoi diagram
 of a set of data points
 and counts  the number of finite edges and the number of rays
@@ -594,6 +595,7 @@ of this diagram
 
 \subsection{Description}
 \label{Subsection_2D_Triangulations_Regular_Description}
+\ccIndexMainItem{power diagram}
 Let ${  PW} = \{(p_i, w_i), i = 1, \ldots , n \}$ be a set of 
 weighted points where each $p_i$ is a point and each $w_i$
 is a scalar called the weight of point $p_i$.