diff --git a/vim/syntax/objc.vim b/vim/syntax/objc.vim
index 2f322d2..7dafb48 100644
--- a/vim/syntax/objc.vim
+++ b/vim/syntax/objc.vim
@@ -39,6 +39,7 @@ syn keyword objcTypeModifier	OF_NULL_RESETTABLE_PROPERTY OF_UNAVAILABLE
 syn keyword objcTypeModifier	OF_DESIGNATED_INITIALIZER OF_METHOD_FAMILY
 syn keyword objcTypeModifier	OF_REQUIRES_SUPER OF_ALIGNOF OF_ALIGNAS
 syn keyword objcTypeModifier	OF_SENTINEL OF_SUBCLASSING_RESTRICTED
+syn keyword objcTypeModifier	OF_DIRECT OF_DIRECT_MEMBERS
 syn keyword objcTypeModifier	_Nonnull _Nullable _Null_unspecified __kindof
 syn keyword objcConstant	nil Nil OF_NOT_FOUND