diff --git a/phpBB/includes/acm/acm_memcache.php b/phpBB/includes/acm/acm_memcache.php
index 52b8832749..5a96509d38 100644
--- a/phpBB/includes/acm/acm_memcache.php
+++ b/phpBB/includes/acm/acm_memcache.php
@@ -37,6 +37,11 @@ if (!defined('PHPBB_ACM_MEMCACHE_HOST'))
 	define('PHPBB_ACM_MEMCACHE_HOST', 'localhost');
 }
 
+if (!defined('PHPBB_ACM_MEMCACHE')){
+	//can define multiple servers with host1::port1,host2::port2 format
+	define('PHPBB_ACM_MEMCACHE', PHPBB_ACM_MEMCACHE_HOST . '::' . PHPBB_ACM_MEMCACHE_PORT);
+}
+
 /**
 * ACM for Memcached
 * @package acm
@@ -54,7 +59,10 @@ class acm extends acm_memory
 		parent::acm_memory();
 
 		$this->memcache = new Memcache;
-		$this->memcache->connect(PHPBB_ACM_MEMCACHE_HOST, PHPBB_ACM_MEMCACHE_PORT);
+		foreach(explode(',', PHPBB_ACM_MEMCACHE) as $u){
+			$parts = explode('::', $u);
+			$this->memcache->addServer($parts[0], $parts[1]);
+		}
 		$this->flags = (PHPBB_ACM_MEMCACHE_COMPRESS) ? MEMCACHE_COMPRESSED : 0;
 	}
 
@@ -125,4 +133,4 @@ class acm extends acm_memory
 	}
 }
 
-?>
\ No newline at end of file
+?>