Index: clang-tidy/objc/PropertyDeclarationCheck.cpp
===================================================================
--- clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -42,6 +42,7 @@
     "[2-9]G",
     "ACL",
     "API",
+    "AR",
     "ARGB",
     "ASCII",
     "BGRA",