Index: boost/config/platform/bsd.hpp
===================================================================
--- boost/config/platform/bsd.hpp	(revision 47802)
+++ boost/config/platform/bsd.hpp	(working copy)
@@ -43,9 +43,21 @@
 //
 // No wide character support in the BSD header files:
 //
-#if !(defined(__FreeBSD__) && (__FreeBSD__ >= 5))
+#if defined(__NetBSD__)
+#define __NetBSD_GCC__ (__GNUC__         * 1000000 \
+			+ __GNUC_MINOR__ *    1000 \
+			+ __GNUC_PATCHLEVEL__)
+// XXX - the following is required until c++config.h
+//       defines _GLIBCXX_HAVE_SWPRINTF and friends
+//       or the preprocessor conditionals are removed
+//       from the cwchar header.
+#define _GLIBCXX_HAVE_SWPRINTF 1
+#endif
+#if !((defined(__FreeBSD__) && (__FreeBSD__ >= 5)) \
+      || (__NetBSD_GCC__ >= 2095003))
 #  define BOOST_NO_CWCHAR
 #endif
+
 //
 // The BSD <ctype.h> has macros only, no functions:
 //