diff --git a/compile.php b/compile.php
index f1b48a0e..3ebf1677 100644
--- a/compile.php
+++ b/compile.php
@@ -76,7 +76,7 @@ function short_identifier($number, $chars) {
 	return $return;
 }
 
-// based on Dgx's PHP shrinker
+// based on http://latrine.dgx.cz/jak-zredukovat-php-skripty
 function php_shrink($input) {
 	$special_variables = array_flip(array('$this', '$GLOBALS', '$_GET', '$_POST', '$_FILES', '$_COOKIE', '$_SESSION', '$_SERVER'));
 	static $short_variables = array();