add versionadded info
diff --git a/Doc/lib/libzipfile.tex b/Doc/lib/libzipfile.tex
index bfe5966..6cdd1d3 100644
--- a/Doc/lib/libzipfile.tex
+++ b/Doc/lib/libzipfile.tex
@@ -165,6 +165,8 @@
         by the ZipExtFile, allowing it to operate independently of the 
         ZipFile.
     \end{notice}
+
+    \versionadded{2.6}
 \end{methoddesc}
 
 \begin{methoddesc}{printdir}{}