diff --git a/upload/source/class/memory/memory_driver_redis.php b/upload/source/class/memory/memory_driver_redis.php
index 56b1a5399aef1ac1d2849f63fb5edb9d9a1dd001..02a0f4916ae35a975b446fd5b6342b742195f597 100644
--- a/upload/source/class/memory/memory_driver_redis.php
+++ b/upload/source/class/memory/memory_driver_redis.php
@@ -90,7 +90,7 @@ class memory_driver_redis {
 	}
 
 	function add($key, $value, $ttl = 0) {
-		return $this->obj->set($key, $value, ['nx', 'ex' => $ttl]);
+		return $this->obj->set($key, $value, array('nx', 'ex' => $ttl));
 	}
 
 	function rm($key) {