diff --git a/docs/save-format.md b/docs/save-format.md
index 02b645dda9..161cc1e944 100644
--- a/docs/save-format.md
+++ b/docs/save-format.md
@@ -69,7 +69,7 @@ General:
   guest-initial-cash:           money16
   guest-initial-hunger:         uint8
   guest-initial-thirst:         uint8
-  guest-spawns:                 xy32
+  guest-spawns:                 xyzd32
   land-price:                   money32
   construction-rights-price:    money32