diff --git a/src/objnam.c b/src/objnam.c
index 979370ac5..8421c3c1f 100644
--- a/src/objnam.c
+++ b/src/objnam.c
@@ -2363,6 +2363,7 @@ static const struct sing_plur one_off[] = {
       "children" },      /* (for wise guys who give their food funny names) */
     { "cubus", "cubi" }, /* in-/suc-cubus */
     { "culus", "culi" }, /* homunculus */
+    { "Cyclops", "Cyclopes" },
     { "djinni", "djinn" },
     { "erinys", "erinyes" },
     { "foot", "feet" },