diff --git a/vim/syntax/objc.vim b/vim/syntax/objc.vim
index cbc9155..bc54444 100644
--- a/vim/syntax/objc.vim
+++ b/vim/syntax/objc.vim
@@ -39,7 +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_ALIGN OF_ALIGNOF OF_ALIGNAS
 syn keyword objcTypeModifier	OF_SENTINEL OF_SUBCLASSING_RESTRICTED
-syn keyword objcTypeModifier	OF_DIRECT OF_DIRECT_MEMBERS
+syn keyword objcTypeModifier	OF_DIRECT OF_DIRECT_MEMBERS OF_DIRECT_PROPERTY
 syn keyword objcTypeModifier	_Nonnull _Nullable _Null_unspecified __kindof
 syn keyword objcConstant	nil Nil OFNotFound