diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index 45303048174..9411bbd4ac5 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -426,7 +426,9 @@ should not be line-wrapped::
     -h, --help  show this help message and exit
 
 :class:`RawTextHelpFormatter` maintains whitespace for all sorts of help text,
-including argument descriptions.
+including argument descriptions. However, multiple new lines are replaced with
+one. If you wish to preserve multiple blank lines, add spaces between the
+newlines.
 
 :class:`ArgumentDefaultsHelpFormatter` automatically adds information about
 default values to each of the argument help messages::