diff --git a/Doc/lib/libimaplib.tex b/Doc/lib/libimaplib.tex
index fdedfcb..45ff50e 100644
--- a/Doc/lib/libimaplib.tex
+++ b/Doc/lib/libimaplib.tex
@@ -413,7 +413,7 @@
   \code{uid search} corresponds to \code{search}.  The \code{thread}
   command first searches the mailbox for messages that match the given
   searching criteria using the charset argument for the interpretation
-  of strings in the searching criteria. It thren returns the matching
+  of strings in the searching criteria. It then returns the matching
   messages threaded according to the specified threading algorithm.
 
   This is an \samp{IMAP4rev1} extension command. \versionadded{2.4}