diff --git a/tee.1 b/tee.1
index 9187f9d..8878197 100644
--- a/tee.1
+++ b/tee.1
@@ -17,6 +17,17 @@ Append output to files, rather than clobbering existing files.
 .BR \-i
 Ignore SIGINT (^C). If you use this, use Ctrl-D (^D) to send an
 EOF in order to exit!
+.SH EXIT STATUS
+The following exit values are returned:
+.TP
+.BR 0
+The program successfully wrote all files.
+.TP
+.BR 1
+Could not open or create a file.
+.TP
+.BR 2
+Failed to write to one or more files.
 .SH AUTHOR
 Written by Kat.
 .SH COPYRIGHT