diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index fb4c82eb9..13a59e1da 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -6812,7 +6812,7 @@ in NetHack 5.0.0. The entire development team acknowledges the work
 done by \fBPasi Kallinen\fP to make that happen.
 .pg
 At the time of the NetHack 5.0 release, the core development team,
-active and alumni, included \fBWarwick Allison\fP, \fBMichael Allison\fP,
+active and erstwhile, included \fBWarwick Allison\fP, \fBMichael Allison\fP,
 \fBKen Arromdee\fP, \fBDavid Cohrs\fP, \fBJessie Collet\fP, \fBBart House\fP,
 \fBKevin Hugo\fP, \fBPasi Kallinen\fP, \fBKen Lorber\fP, \fBDean Luick\fP,
 \fBPat Rankin\fP, \fBDerek S. Ray\fP, \bBAlex Smith\fP, \fBPatric Mueller\fP,