diff --git a/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt b/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
index 24b67d7a036..6b2afb9166f 100644
--- a/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
+++ b/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
@@ -491,7 +491,7 @@ described in \cgalCite{gueziec2001cutting}.
 To deal with polygon soups that cannot be converted to a
 combinatorial manifold surface, some points are duplicated.
 Because a polygon soup does not have any connectivity (each point
-has as many occurences as the number of polygons it belongs to),
+has as many occurrences as the number of polygons it belongs to),
 duplicating one point (or a pair of points)
 amounts to duplicate the polygon to which it belongs.
 
diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orient_polygon_soup.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orient_polygon_soup.h
index 5a82927850b..f2093d24603 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orient_polygon_soup.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orient_polygon_soup.h
@@ -448,7 +448,7 @@ struct Polygon_soup_orienter
  * When it is not possible to produce a combinatorial manifold surface,
  * some points are duplicated.
  * Because a polygon soup does not have any connectivity (each point
- * has as many occurences as the number of polygons it belongs to),
+ * has as many occurrences as the number of polygons it belongs to),
  * duplicating one point (or a pair of points)
  * amounts to duplicate the polygon to which it belongs.
  *