diff --git a/src/table/gameopt_settings.ini b/src/table/gameopt_settings.ini
--- a/src/table/gameopt_settings.ini
+++ b/src/table/gameopt_settings.ini
@@ -59,7 +59,7 @@ strhelp  = STR_CONFIG_SETTING_NO_EXPLANA
 strval   = STR_NULL
 proc     = NULL
 load     = NULL
-from     = 0
+from     = SL_MIN_VERSION
 to       = SL_MAX_VERSION
 cat      = SC_ADVANCED
 
@@ -77,7 +77,7 @@ def      = 0
 min      = 0
 max      = 0
 full     = NULL
-to       = 4
+to       = SLV_4
 
 [SDTG_GENERAL]
 name     = ""diff_custom""
@@ -91,7 +91,7 @@ def      = 0
 min      = 0
 max      = 0
 full     = NULL
-from     = 4
+from     = SLV_4
 
 ##
 [SDTG_VAR]
@@ -152,21 +152,21 @@ type     = SLE_UINT8
 def      = DEF_SNOWLINE_HEIGHT * TILE_HEIGHT
 min      = MIN_SNOWLINE_HEIGHT * TILE_HEIGHT
 max      = MAX_SNOWLINE_HEIGHT * TILE_HEIGHT
-to       = 22
+to       = SLV_22
 
 [SDT_NULL]
 length   = 1
-from     = 22
-to       = 165
+from     = SLV_22
+to       = SLV_165
 
 [SDT_NULL]
 length   = 1
-to       = 23
+to       = SLV_23
 
 [SDTC_OMANY]
 var      = gui.autosave
 type     = SLE_UINT8
-from     = 23
+from     = SLV_23
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
 def      = 1
 max      = 4