diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index 8e43570..ef6c3e5 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -99,8 +99,8 @@
 	 */
 	function _get_mod_time($dir)
 	{
-		// filemtime() will return false, but it does raise an error.
-		$date = (file_exists($dir) && @filemtime($dir)) ? filemtime($dir) : getdate($this->now);
+		// filemtime() may return false, but raises an error for non-existing files
+		$date = (file_exists($dir) && filemtime($dir)) ? filemtime($dir) : getdate($this->now);
 
 		$time['file_mtime'] = ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2;
 		$time['file_mdate'] = (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday'];