diff --git a/mods/MAPGEN/mcl_mapgen_core/init.lua b/mods/MAPGEN/mcl_mapgen_core/init.lua
index e09a86ffe..724c576a9 100644
--- a/mods/MAPGEN/mcl_mapgen_core/init.lua
+++ b/mods/MAPGEN/mcl_mapgen_core/init.lua
@@ -105,7 +105,15 @@ if superflat then
 end
 
 if mg_name == "v7" then
-	minetest.set_mapgen_setting("mgv7_cavern_threshold", "0.15", true)
+	minetest.set_mapgen_setting("mgv7_cavern_threshold", "0.20", true)
+elseif mg_name == "valleys" then
+	minetest.set_mapgen_setting("mgvalleys_cavern_threshold", "0.20", true)
+elseif mg_name == "carpathian" then
+	minetest.set_mapgen_setting("mgcarpathian_cavern_threshold", "0.20", true)
+elseif mg_name == "v5" then
+	minetest.set_mapgen_setting("mgv5_cavern_threshold", "0.20", true)
+elseif mg_name == "fractal" then
+	minetest.set_mapgen_setting("mgfractal_cavern_threshold", "0.20", true)
 end
 
 local mg_flags_str = ""