diff --git a/system/storage.php b/system/storage.php
index 7ef3477..491bb59 100644
--- a/system/storage.php
+++ b/system/storage.php
@@ -316,7 +316,7 @@ if(!function_exists("get_file_extension")) {
 }
 
 if(!function_exists("check_file_extension")) {
-	function check_file_extension($file, $extension, $options) {
+	function check_file_extension($file, $extension, $options=array()) {
 		return (get_file_extension($file, $options) === $extension);
 	}
 }