diff --git a/core/util.inc.php b/core/util.inc.php
index 471af9bf..358dbeb0 100644
--- a/core/util.inc.php
+++ b/core/util.inc.php
@@ -502,6 +502,7 @@ function format_text($string) {
 
 function warehouse_path($base, $hash, $create=true) {
 	$ab = substr($hash, 0, 2);
+	$cd = substr($hash, 2, 2);
 	$pa = "$base/$ab/$hash";
 	if($create && !file_exists(dirname($pa))) mkdir(dirname($pa), 0755, true);
 	return $pa;