diff --git a/doc/fixes37.0 b/doc/fixes37.0
index 17c15b4e9..86faf42df 100644
--- a/doc/fixes37.0
+++ b/doc/fixes37.0
@@ -720,6 +720,7 @@ corpse of monster with gender specific names (king vs queen and so forth)
 	was always described by the neutral name (ruler and such)
 prevent obj_pmname() from calling mon_pmname(monst) when monst->data is null
 	to prevent a null pointer dereference
+correct the pluralization of monarch to monarchs, rather than monarches
 
 curses: 'msg_window' option wasn't functional for curses unless the binary
 	also included tty support
diff --git a/src/objnam.c b/src/objnam.c
index c1f1111d7..64a8933a0 100644
--- a/src/objnam.c
+++ b/src/objnam.c
@@ -1,4 +1,4 @@
-/* NetHack 3.7	objnam.c	$NHDT-Date: 1620348711 2021/05/07 00:51:51 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.315 $ */
+ /* NetHack 3.7	objnam.c	$NHDT-Date: 1620348711 2021/05/07 00:51:51 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.315 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2011. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -2143,6 +2143,7 @@ static const struct sing_plur one_off[] = {
     { "knife", "knives" },
     { "labrum", "labra" }, /* candelabrum */
     { "louse", "lice" },
+    { "monarch", "monarchs" },
     { "mouse", "mice" },
     { "mumak", "mumakil" },
     { "nemesis", "nemeses" },