diff --git a/dungeon.lua b/dungeon.lua
index 6c7bcf9..eb16936 100644
--- a/dungeon.lua
+++ b/dungeon.lua
@@ -542,7 +542,7 @@ fun_caves.dungeon = function(minp_in, maxp_in, data, p2data, area, node, heightm
 									elseif ry == (cell_size - 1) and (cy < (cells_y - 1) or not centered_in) then
 										data[ivm] = node['fun_caves:dungeon_floor_2']
 									elseif content[cx][cy][cz] == 'room' then
-										if ry == 1 and math.random(50) == 1 and data[ivm - area.ystride] == node['fun_caves:dungeon_floor_1'] then
+										if ry == 1 and math.random(250) == 1 and data[ivm - area.ystride] == node['fun_caves:dungeon_floor_1'] then
 											data[ivm] = node['fun_caves:coffer']
 										else
 											data[ivm] = node['air']