diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -403,10 +403,10 @@ struct GenerateLandscapeWindow : public 
 
 		/* You can't select smoothness / non-water borders if not terragenesis */
 		if (mode == GLWM_GENERATE) {
-			this->SetWidgetDisabledState(WID_GL_SMOOTHNESS_PULLDOWN, _settings_newgame.game_creation.land_generator == 0);
-			this->SetWidgetDisabledState(WID_GL_VARIETY_PULLDOWN, _settings_newgame.game_creation.land_generator == 0);
-			this->SetWidgetDisabledState(WID_GL_BORDERS_RANDOM, _settings_newgame.game_creation.land_generator == 0 || !_settings_newgame.construction.freeform_edges);
-			this->SetWidgetsDisabledState(_settings_newgame.game_creation.land_generator == 0 || !_settings_newgame.construction.freeform_edges || _settings_newgame.game_creation.water_borders == BORDERS_RANDOM,
+			this->SetWidgetDisabledState(WID_GL_SMOOTHNESS_PULLDOWN, _settings_newgame.game_creation.land_generator == LG_ORIGINAL);
+			this->SetWidgetDisabledState(WID_GL_VARIETY_PULLDOWN, _settings_newgame.game_creation.land_generator == LG_ORIGINAL);
+			this->SetWidgetDisabledState(WID_GL_BORDERS_RANDOM, _settings_newgame.game_creation.land_generator == LG_ORIGINAL || !_settings_newgame.construction.freeform_edges);
+			this->SetWidgetsDisabledState(_settings_newgame.game_creation.land_generator == LG_ORIGINAL || !_settings_newgame.construction.freeform_edges || _settings_newgame.game_creation.water_borders == BORDERS_RANDOM,
 					WID_GL_WATER_NW, WID_GL_WATER_NE, WID_GL_WATER_SE, WID_GL_WATER_SW, WIDGET_LIST_END);
 
 			this->SetWidgetLoweredState(WID_GL_BORDERS_RANDOM, _settings_newgame.game_creation.water_borders == BORDERS_RANDOM);
@@ -416,7 +416,7 @@ struct GenerateLandscapeWindow : public 
 			this->SetWidgetLoweredState(WID_GL_WATER_SE, HasBit(_settings_newgame.game_creation.water_borders, BORDER_SE));
 			this->SetWidgetLoweredState(WID_GL_WATER_SW, HasBit(_settings_newgame.game_creation.water_borders, BORDER_SW));
 
-			this->SetWidgetsDisabledState(_settings_newgame.game_creation.land_generator == 0 && (_settings_newgame.game_creation.landscape == LT_ARCTIC || _settings_newgame.game_creation.landscape == LT_TROPIC),
+			this->SetWidgetsDisabledState(_settings_newgame.game_creation.land_generator == LG_ORIGINAL && (_settings_newgame.game_creation.landscape == LT_ARCTIC || _settings_newgame.game_creation.landscape == LT_TROPIC),
 					WID_GL_TERRAIN_PULLDOWN, WID_GL_WATER_PULLDOWN, WIDGET_LIST_END);
 		}
 
@@ -432,7 +432,7 @@ struct GenerateLandscapeWindow : public 
 		this->SetWidgetDisabledState(WID_GL_SNOW_LEVEL_UP,   _settings_newgame.game_creation.snow_line_height >= MAX_SNOWLINE_HEIGHT || _settings_newgame.game_creation.landscape != LT_ARCTIC);
 
 		/* Do not allow a custom sea level with the original land generator. */
-		if (_settings_newgame.game_creation.land_generator == 0 &&
+		if (_settings_newgame.game_creation.land_generator == LG_ORIGINAL &&
 				_settings_newgame.difficulty.quantity_sea_lakes == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
 			_settings_newgame.difficulty.quantity_sea_lakes = CUSTOM_SEA_LEVEL_MIN_PERCENTAGE;
 		}
@@ -655,7 +655,7 @@ struct GenerateLandscapeWindow : public 
 			case WID_GL_WATER_PULLDOWN: { // Water quantity
 				uint32 hidden_mask = 0;
 				/* Disable custom water level when the original map generator is active. */
-				if (_settings_newgame.game_creation.land_generator == 0) {
+				if (_settings_newgame.game_creation.land_generator == LG_ORIGINAL) {
 					SetBit(hidden_mask, CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY);
 				}
 				ShowDropDownMenu(this, _sea_lakes, _settings_newgame.difficulty.quantity_sea_lakes, WID_GL_WATER_PULLDOWN, 0, hidden_mask);