diff --git a/docs/latex/wx/mbcnvfil.tex b/docs/latex/wx/mbcnvfil.tex
index e5e04f8b7a..f394797bbb 100644
--- a/docs/latex/wx/mbcnvfil.tex
+++ b/docs/latex/wx/mbcnvfil.tex
@@ -5,13 +5,23 @@
 
 \section{\class{wxMBConvFile}}\label{wxmbconvfile}
 
-This class converts file names between filesystem multibyte encoding and
-Unicode. It has one predefined instance, {\bf wxConvFileName}.
+This class used to be used for defining the class instance
+{\bf wxConvFileName}, but nowadays {\bf wxConvFileName} is
+either of type wxConvLibc (on most platforms) or wxConvUTF8
+(on MacOS X). {\bf wxConvFileName} converts filenames between 
+filesystem multibyte encoding and Unicode. {\bf wxConvFileName} 
+can also be set to a something else at run-time which is used 
+e.g. by wxGTK to use a class which checks the environment 
+variable {\bf G_FILESYSTEM_ENCODING} indicating that filenames 
+should not be interpreted as UTF8 and also for converting 
+invalid UTF8 characters (e.g. if there is a filename in iso8859_1)
+to strings with octal values. 
+
 Since some platforms (e.g. Win32) use Unicode in the filenames,
 and others (e.g. Unix) use multibyte encodings, this class should only
 be used directly if wxMBFILES is defined to 1. A convenience macro,
-wxFNCONV, is defined to wxConvFile.cWX2MB in this case. You could use it
-like this:
+wxFNCONV, is defined to wxConvFileName->cWX2MB in this case. You could
+use it like this:
 
 \begin{verbatim}
 wxChar *name = wxT("rawfile.doc");