diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index c634b11..ab30a90 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -133,7 +133,7 @@
 	protected function _get_mod_time($dir)
 	{
 		// filemtime() may return false, but raises an error for non-existing files
-		$date = file_exists($dir) ? filemtime($dir) : getdate($this->now);
+		$date = file_exists($dir) ? getdate(filemtime($dir)) : getdate($this->now);
 
 		return array(
 			'file_mtime' => ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2,