diff --git a/README b/README
index 3ab119df2a..465a68e3b3 100644
--- a/README
+++ b/README
@@ -298,6 +298,9 @@ Building
 	a nonstandard prefix, you can tell configure where to
 	look for it using "--with-openssl=/prefix".
 
+	Python requires 'argparse' to be available.  'argparse' is
+	a standard module as of Python 2.7 and Python 3.2.
+
 	On some platforms it is necessary to explicitly request large
 	file support to handle files bigger than 2GB.  This can be
 	done by "--enable-largefile" on the configure command line.