diff --git a/STL_Extension/include/CGAL/iterator.h b/STL_Extension/include/CGAL/iterator.h
index 0b0915224ec..b93190ded73 100644
--- a/STL_Extension/include/CGAL/iterator.h
+++ b/STL_Extension/include/CGAL/iterator.h
@@ -589,7 +589,7 @@ public:
       ++c_;
   }
 
-  // for non-const -> const convertion for example
+  // for non-const -> const conversion for example
   template <class Iterator2>
   Filter_iterator(const Filter_iterator<Iterator2, Predicate>& fi,
                   std::enable_if_t<std::is_convertible_v<Iterator2, Iterator>>* = nullptr)