diff --git a/preload.lua b/preload.lua
index ccb8b6d..8f5a7ff 100644
--- a/preload.lua
+++ b/preload.lua
@@ -5,6 +5,9 @@ local commander = require 'commander'
 local bait = require 'bait'
 local old_dir = hilbish.cwd()
 
+local shlvl = tonumber(os.getenv 'SHLVL')
+if shlvl ~= nil then os.setenv('SHLVL', shlvl + 1) else os.setenv('SHLVL', 1) end
+
 -- Builtins
 commander.register('cd', function (args)
 	bait.throw('cd', args)