Correct documentation for Context.check_privatekey
diff --git a/doc/pyOpenSSL.tex b/doc/pyOpenSSL.tex
index 9b68869..9e8376c 100644
--- a/doc/pyOpenSSL.tex
+++ b/doc/pyOpenSSL.tex
@@ -671,7 +671,7 @@
\begin{methoddesc}[Context]{check_privatekey}{}
Check if the private key (loaded with \method{use_privatekey\optional{_file}})
matches the certificate (loaded with \method{use_certificate\optional{_file}}).
-Returns true if they match, false otherwise.
+Returns \code{None} if they match, raises \exception{Error} otherwise.
\end{methoddesc}
\begin{methoddesc}[Context]{get_app_data}{}