diff --git a/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/K_neighbor_query.h b/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/K_neighbor_query.h
index 4a0588a7715..15899022799 100644
--- a/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/K_neighbor_query.h
+++ b/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/K_neighbor_query.h
@@ -239,6 +239,10 @@ namespace Point_set {
     const Index_to_point_map& index_to_point_map() const {
       return m_index_to_point_map;
     }
+
+    void set_k(const std::size_t k) {
+      m_number_of_neighbors = k;
+    }
     /// \endcond
 
   private:
diff --git a/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/Sphere_neighbor_query.h b/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/Sphere_neighbor_query.h
index 8535c4fbc94..ebe3b677f31 100644
--- a/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/Sphere_neighbor_query.h
+++ b/Shape_detection/include/CGAL/Shape_detection/Region_growing/Region_growing_on_point_set/Sphere_neighbor_query.h
@@ -232,6 +232,10 @@ namespace Point_set {
     const Index_to_point_map& index_to_point_map() const {
       return m_index_to_point_map;
     }
+
+    void set_sphere_radius(const FT sphere_radius) {
+      m_sphere_radius = sphere_radius;
+    }
     /// \endcond
 
   private: