diff --git a/Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3_ref/Periodic_3_Delaunay_triangulation_3.tex b/Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3_ref/Periodic_3_Delaunay_triangulation_3.tex
index 4f115515913..4399d4a9f28 100644
--- a/Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3_ref/Periodic_3_Delaunay_triangulation_3.tex
+++ b/Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3_ref/Periodic_3_Delaunay_triangulation_3.tex
@@ -288,7 +288,7 @@ dual(Vertex_handle v, OutputIterator pts) const;}
 {Returns the volume of the Voronoi cell dual to \ccc{v}.}
 
 \ccMethod{Point dual_centroid(Vertex_handle v) const;}
-{Returns the cetroid of the Voronoi cell dual to \ccc{v}.}
+{Returns the centroid of the Voronoi cell dual to \ccc{v}.}
 
 \begin{ccAdvanced}
 \ccHeading{Checking}