diff --git a/mkht.php b/mkht.php
index 12ede3e..518ac66 100755
--- a/mkht.php
+++ b/mkht.php
@@ -5,7 +5,7 @@ if (php_sapi_name() !== 'cli')
 umask(0022);
 const LF = "\n";
 
-define('ROOT', dirname($_SERVER['SCRIPT_FILENAME']));
+define('ROOT', dirname(realpath($_SERVER['SCRIPT_FILENAME'])));
 
 if (!extension_loaded('tidy'))
 	echo 'PHP tidy extension unavailable. Feature disabled.' . PHP_EOL;