diff --git a/source/utf8/checked.h b/source/utf8/checked.h
index 0567b50..648636e 100644
--- a/source/utf8/checked.h
+++ b/source/utf8/checked.h
@@ -263,11 +263,16 @@ namespace utf8
 
     // The iterator class
     template <typename octet_iterator>
-    class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
+    class iterator {
       octet_iterator it;
       octet_iterator range_start;
       octet_iterator range_end;
       public:
+      typedef uint32_t value_type;
+      typedef uint32_t* pointer;
+      typedef uint32_t& reference;
+      typedef std::ptrdiff_t difference_type;
+      typedef std::bidirectional_iterator_tag iterator_category;
       iterator () {}
       explicit iterator (const octet_iterator& octet_it,
                          const octet_iterator& rangestart,
diff --git a/source/utf8/unchecked.h b/source/utf8/unchecked.h
index def0009..0e1b51c 100644
--- a/source/utf8/unchecked.h
+++ b/source/utf8/unchecked.h
@@ -217,9 +217,14 @@ namespace utf8
 
         // The iterator class
         template <typename octet_iterator>
-          class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> { 
+          class iterator {
             octet_iterator it;
             public:
+            typedef uint32_t value_type;
+            typedef uint32_t* pointer;
+            typedef uint32_t& reference;
+            typedef std::ptrdiff_t difference_type;
+            typedef std::bidirectional_iterator_tag iterator_category;
             iterator () {}
             explicit iterator (const octet_iterator& octet_it): it(octet_it) {}
             // the default "big three" are OK