diff --git a/Doc/lib/libgzip.tex b/Doc/lib/libgzip.tex
index 34ec897..aab70a1 100644
--- a/Doc/lib/libgzip.tex
+++ b/Doc/lib/libgzip.tex
@@ -21,8 +21,8 @@
 \begin{classdesc}{GzipFile}{\optional{filename\optional{, mode\optional{,
                             compresslevel\optional{, fileobj}}}}}
 Constructor for the \class{GzipFile} class, which simulates most of
-the methods of a file object, with the exception of the
-\method{seek()} and \method{tell()} methods.  At least one of
+the methods of a file object, with the exception of the \method{readinto()},
+\method{truncate()}, and \method{xreadlines()} methods.  At least one of
 \var{fileobj} and \var{filename} must be given a non-trivial value.
 
 The new class instance is based on \var{fileobj}, which can be a