Grammar fix
diff --git a/Doc/lib/emailmessage.tex b/Doc/lib/emailmessage.tex
index 7bd7dd8..a9f7298 100644
--- a/Doc/lib/emailmessage.tex
+++ b/Doc/lib/emailmessage.tex
@@ -34,7 +34,7 @@
\end{classdesc}
\begin{methoddesc}[Message]{as_string}{\optional{unixfrom}}
-Return the entire message flatten as a string. When optional
+Return the entire message flattened as a string. When optional
\var{unixfrom} is \code{True}, the envelope header is included in the
returned string. \var{unixfrom} defaults to \code{False}.