diff --git a/Doc/lib/libsignal.tex b/Doc/lib/libsignal.tex
index cfdb4dd..e98aa90 100644
--- a/Doc/lib/libsignal.tex
+++ b/Doc/lib/libsignal.tex
@@ -101,8 +101,7 @@
   be scheduled at any time).  The returned value is then the number of
   seconds before any previously set alarm was to have been delivered.
   If \var{time} is zero, no alarm is scheduled, and any scheduled
-  alarm is canceled.  The return value is the number of seconds
-  remaining before a previously scheduled alarm.  If the return value
+  alarm is canceled.  If the return value
   is zero, no alarm is currently scheduled.  (See the \UNIX{} man page
   \manpage{alarm}{2}.)
   Availability: \UNIX.
diff --git a/Doc/lib/libsmtplib.tex b/Doc/lib/libsmtplib.tex
index 1c034e7..7786102 100644
--- a/Doc/lib/libsmtplib.tex
+++ b/Doc/lib/libsmtplib.tex
@@ -113,6 +113,10 @@
   The server refused our \samp{HELO} message.
 \end{excdesc}
 
+\begin{excdesc}{SMTPAuthenticationError}
+  SMTP authentication went wrong.  Most probably the server didn't accept
+  the username/password combination provided.
+\end{excdesc}
 
 \begin{seealso}
   \seerfc{821}{Simple Mail Transfer Protocol}{Protocol definition for