diff --git a/Classification/include/CGAL/Classification/Feature_set.h b/Classification/include/CGAL/Classification/Feature_set.h
index b9eee589d90..91ebf5c99ac 100644
--- a/Classification/include/CGAL/Classification/Feature_set.h
+++ b/Classification/include/CGAL/Classification/Feature_set.h
@@ -58,7 +58,7 @@ class Feature_set
 public:
 
 #ifdef DOXYGEN_RUNNING
-  using const_iterator = unspecified_type; ///< A random access iterator with value type `Feature_handle`.
+  using const_iterator = unspecified_type; ///< A random access constant iterator with value type `Feature_handle`.
   using iterator = unspecified_type; ///< A random access iterator with value type `Feature_handle`.
 #else
   using const_iterator = std::vector<Feature_handle>::const_iterator;
diff --git a/Classification/include/CGAL/Classification/Label_set.h b/Classification/include/CGAL/Classification/Label_set.h
index 013fb8cd966..d3e84acb4c9 100644
--- a/Classification/include/CGAL/Classification/Label_set.h
+++ b/Classification/include/CGAL/Classification/Label_set.h
@@ -41,7 +41,7 @@ class Label_set
 public:
 
 #ifdef DOXYGEN_RUNNING
-  using const_iterator = unspecified_type; ///< A random access iterator with value type `Label_handle`.
+  using const_iterator = unspecified_type; ///< A random access constant iterator with value type `Label_handle`.
   using iterator = unspecified_type; ///< A random access iterator with value type `Label_handle`.
 #else
   using const_iterator = std::vector<Label_handle>::const_iterator;