diff --git a/src/table/misc_settings.ini b/src/table/misc_settings.ini
index 769943559a..c4683d4c97 100644
--- a/src/table/misc_settings.ini
+++ b/src/table/misc_settings.ini
@@ -325,7 +325,7 @@ type     = SLE_UINT8
 var      = _zoning.inner
 def      = 0
 min      = 0
-max      = ZEM_END
+max      = ZEM_END - 1
 cat      = SC_BASIC
 
 [SDTG_VAR]
@@ -334,7 +334,7 @@ type     = SLE_UINT8
 var      = _zoning.outer
 def      = 0
 min      = 0
-max      = ZEM_END
+max      = ZEM_END - 1
 cat      = SC_BASIC
 
 [SDTG_END]