--- concepts.hpp.orig	2007-05-27 09:55:48.000000000 -0700
+++ concepts.hpp	2007-05-27 09:56:09.000000000 -0700
@@ -115,11 +115,11 @@
 struct multichar_wfilter : multichar_filter<Mode, Ch> { };
 
 typedef multichar_filter<input>     multichar_input_filter;
-typedef multichar_filter<input>     multichar_input_wfilter;
+typedef multichar_wfilter<input>     multichar_input_wfilter;
 typedef multichar_filter<output>    multichar_output_filter;
-typedef multichar_filter<output>    multichar_output_wfilter;
+typedef multichar_wfilter<output>    multichar_output_wfilter;
 typedef multichar_filter<dual_use>  multichar_dual_use_filter;
-typedef multichar_filter<dual_use>  multichar_dual_use_wfilter;
+typedef multichar_wfilter<dual_use>  multichar_dual_use_wfilter;
 
 //----------------------------------------------------------------------------//