diff --git a/php_memcached.c b/php_memcached.c
index 50636952..e1fd0784 100644
--- a/php_memcached.c
+++ b/php_memcached.c
@@ -4458,34 +4458,47 @@ static void php_memc_register_constants(INIT_FUNC_ARGS)
 	 * libmemcached result codes
 	 */
 
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_SUCCESS,              MEMCACHED_SUCCESS);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_FAILURE,              MEMCACHED_FAILURE);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_HOST_LOOKUP_FAILURE,  MEMCACHED_HOST_LOOKUP_FAILURE);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_UNKNOWN_READ_FAILURE, MEMCACHED_UNKNOWN_READ_FAILURE);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_PROTOCOL_ERROR,       MEMCACHED_PROTOCOL_ERROR);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_CLIENT_ERROR,         MEMCACHED_CLIENT_ERROR);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_SERVER_ERROR,         MEMCACHED_SERVER_ERROR);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_WRITE_FAILURE,        MEMCACHED_WRITE_FAILURE);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_DATA_EXISTS,          MEMCACHED_DATA_EXISTS);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOTSTORED,            MEMCACHED_NOTSTORED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOTFOUND,             MEMCACHED_NOTFOUND);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_PARTIAL_READ,         MEMCACHED_PARTIAL_READ);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_SOME_ERRORS,          MEMCACHED_SOME_ERRORS);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_NO_SERVERS,           MEMCACHED_NO_SERVERS);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_END,                  MEMCACHED_END);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_ERRNO,                MEMCACHED_ERRNO);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_BUFFERED,             MEMCACHED_BUFFERED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_TIMEOUT,              MEMCACHED_TIMEOUT);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_BAD_KEY_PROVIDED,     MEMCACHED_BAD_KEY_PROVIDED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_STORED,               MEMCACHED_STORED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_DELETED,              MEMCACHED_DELETED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_STAT,                 MEMCACHED_STAT);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_ITEM,                 MEMCACHED_ITEM);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOT_SUPPORTED,        MEMCACHED_NOT_SUPPORTED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_FETCH_NOTFINISHED,    MEMCACHED_FETCH_NOTFINISHED);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_SERVER_MARKED_DEAD,   MEMCACHED_SERVER_MARKED_DEAD);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_UNKNOWN_STAT_KEY,     MEMCACHED_UNKNOWN_STAT_KEY);
-	REGISTER_MEMC_CLASS_CONST_LONG(RES_INVALID_HOST_PROTOCOL, MEMCACHED_INVALID_HOST_PROTOCOL);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_SUCCESS,                   MEMCACHED_SUCCESS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_FAILURE,                   MEMCACHED_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_HOST_LOOKUP_FAILURE,       MEMCACHED_HOST_LOOKUP_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_CONNECTION_FAILURE,        MEMCACHED_CONNECTION_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_CONNECTION_BIND_FAILURE,   MEMCACHED_CONNECTION_BIND_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_WRITE_FAILURE,             MEMCACHED_WRITE_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_READ_FAILURE,              MEMCACHED_READ_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_UNKNOWN_READ_FAILURE,      MEMCACHED_UNKNOWN_READ_FAILURE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_PROTOCOL_ERROR,            MEMCACHED_PROTOCOL_ERROR);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_CLIENT_ERROR,              MEMCACHED_CLIENT_ERROR);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_SERVER_ERROR,              MEMCACHED_SERVER_ERROR);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_DATA_EXISTS,               MEMCACHED_DATA_EXISTS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_DATA_DOES_NOT_EXIST,       MEMCACHED_DATA_DOES_NOT_EXIST);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOTSTORED,                 MEMCACHED_NOTSTORED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_STORED,                    MEMCACHED_STORED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOTFOUND,                  MEMCACHED_NOTFOUND);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_PARTIAL_READ,              MEMCACHED_PARTIAL_READ);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_SOME_ERRORS,               MEMCACHED_SOME_ERRORS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_NO_SERVERS,                MEMCACHED_NO_SERVERS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_END,                       MEMCACHED_END);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_DELETED,                   MEMCACHED_DELETED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_VALUE,                     MEMCACHED_VALUE);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_STAT,                      MEMCACHED_STAT);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_ITEM,                      MEMCACHED_ITEM);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_ERRNO,                     MEMCACHED_ERRNO);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_FAIL_UNIX_SOCKET,          MEMCACHED_FAIL_UNIX_SOCKET);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_NOT_SUPPORTED,             MEMCACHED_NOT_SUPPORTED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_NO_KEY_PROVIDED,           MEMCACHED_NO_KEY_PROVIDED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_FETCH_NOTFINISHED,         MEMCACHED_FETCH_NOTFINISHED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_TIMEOUT,                   MEMCACHED_TIMEOUT);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_BUFFERED,                  MEMCACHED_BUFFERED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_BAD_KEY_PROVIDED,          MEMCACHED_BAD_KEY_PROVIDED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_INVALID_HOST_PROTOCOL,     MEMCACHED_INVALID_HOST_PROTOCOL);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_SERVER_MARKED_DEAD,        MEMCACHED_SERVER_MARKED_DEAD);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_UNKNOWN_STAT_KEY,          MEMCACHED_UNKNOWN_STAT_KEY);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_INVALID_ARGUMENTS,         MEMCACHED_INVALID_ARGUMENTS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_PARSE_ERROR,               MEMCACHED_PARSE_ERROR);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_PARSE_USER_ERROR,          MEMCACHED_PARSE_USER_ERROR);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_DEPRECATED,                MEMCACHED_DEPRECATED);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_IN_PROGRESS,               MEMCACHED_IN_PROGRESS);
+	REGISTER_MEMC_CLASS_CONST_LONG(RES_MAXIMUM_RETURN,            MEMCACHED_MAXIMUM_RETURN);
 	REGISTER_MEMC_CLASS_CONST_LONG(RES_MEMORY_ALLOCATION_FAILURE, MEMCACHED_MEMORY_ALLOCATION_FAILURE);
 	REGISTER_MEMC_CLASS_CONST_LONG(RES_CONNECTION_SOCKET_CREATE_FAILURE, MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE);