diff --git a/data/lua/cave_map_generator.lua b/data/lua/cave_map_generator.lua
index 9dad2938daf1..d958529e2297 100644
--- a/data/lua/cave_map_generator.lua
+++ b/data/lua/cave_map_generator.lua
@@ -48,6 +48,10 @@ function callbacks.generate_map(params)
 			params.chance = 0
 			goto continue
 		end
+		if type(chamber.require_player) == "number" and chamber.require_player > params.nplayers then
+			params.chance = 0
+			goto continue
+		end
 		-- Ditto, set it to 100
 		params.chance = 100
 		local locs_set = LS.create()