diff --git a/Polytope_distance_d/doc/Polytope_distance_d/Concepts/WidthTraits_3.h b/Polytope_distance_d/doc/Polytope_distance_d/Concepts/WidthTraits_3.h
index cb34903e50a..6f882dd1280 100644
--- a/Polytope_distance_d/doc/Polytope_distance_d/Concepts/WidthTraits_3.h
+++ b/Polytope_distance_d/doc/Polytope_distance_d/Concepts/WidthTraits_3.h
@@ -27,7 +27,7 @@ public:
 
 /*!
 The point type. The (in)equality tests must be
-available. Access to the point coordinates is done via the `get_.()`
+available. Access to the point coordinates is done via the `get_...()`
 functions. Constructing a point is done with the `make_point( )`
 operation.
 */
@@ -35,7 +35,7 @@ typedef unspecified_type Point_3;
 
 /*!
 The plane type. Access to the coefficients of the
-plane is made via the `get_.()` functions. Constructing a plane is
+plane is made via the `get_...()` functions. Constructing a plane is
 done with the `make_plane()` operation.
 */
 typedef unspecified_type Plane_3;