diff --git a/Doc/library/gzip.rst b/Doc/library/gzip.rst
index a2fa3fa..659a027 100644
--- a/Doc/library/gzip.rst
+++ b/Doc/library/gzip.rst
@@ -72,7 +72,7 @@
 
    :class:`GzipFile` supports the :class:`io.BufferedIOBase` interface,
    including iteration and the :keyword:`with` statement.  Only the
-   :meth:`truncate` method isn't implemented.
+   :meth:`read1` and :meth:`truncate` methods aren't implemented.
 
    :class:`GzipFile` also provides the following method: