diff --git a/docs/doxygen/overviews/unicode.h b/docs/doxygen/overviews/unicode.h
index d60e6bb13f..bb58e1f1ba 100644
--- a/docs/doxygen/overviews/unicode.h
+++ b/docs/doxygen/overviews/unicode.h
@@ -84,7 +84,7 @@ should be replaced (especially in time critical places) with:
 
 @code
 wxString s = "hello";
-wxString::iterator i;
+wxString::const_iterator i;
 for (i = s.begin(); i != s.end(); ++i)
 {
     wxUniChar uni_ch = *i;