Index: vim/syntax/objc.vim
==================================================================
--- vim/syntax/objc.vim
+++ vim/syntax/objc.vim
@@ -134,10 +134,11 @@
 syn keyword objcType of_resolver_result_t of_udp_socket_address_t of_offset_t
 syn keyword objcType of_socket_t of_spinlock_t
 syn keyword objcType of_options_parser_option_t of_http_request_method_t
 syn keyword objcType of_http_request_protocol_version_t of_socket_address_t
 syn keyword objcType of_file_attribute_key_t of_file_type_t of_file_attributes_t
+syn keyword objcType of_mutable_file_attributes_t
 syn keyword objcConstant YES NO TRUE FALSE
 
 syn region objcImp start='@implementation' end='@end' transparent
 syn region objcHeader start='@interface' end='@end' transparent