diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -2699,6 +2699,8 @@
         "NSDecimalNumber",
         "NSDictionary",
         "NSEdgeInsets",
+        "NSError",
+        "NSErrorDomain",
         "NSHashTable",
         "NSIndexPath",
         "NSIndexSet",
@@ -2760,6 +2762,7 @@
                                 FormatTok->TokenText)) ||
             FormatTok->is(TT_ObjCStringLiteral) ||
             FormatTok->isOneOf(Keywords.kw_NS_CLOSED_ENUM, Keywords.kw_NS_ENUM,
+                               Keywords.kw_NS_ERROR_ENUM,
                                Keywords.kw_NS_OPTIONS, TT_ObjCBlockLBrace,
                                TT_ObjCBlockLParen, TT_ObjCDecl, TT_ObjCForIn,
                                TT_ObjCMethodExpr, TT_ObjCMethodSpecifier,
diff --git a/clang/lib/Format/FormatToken.h b/clang/lib/Format/FormatToken.h
--- a/clang/lib/Format/FormatToken.h
+++ b/clang/lib/Format/FormatToken.h
@@ -949,6 +949,7 @@
     kw_CF_OPTIONS = &IdentTable.get("CF_OPTIONS");
     kw_NS_CLOSED_ENUM = &IdentTable.get("NS_CLOSED_ENUM");
     kw_NS_ENUM = &IdentTable.get("NS_ENUM");
+    kw_NS_ERROR_ENUM = &IdentTable.get("NS_ERROR_ENUM");
     kw_NS_OPTIONS = &IdentTable.get("NS_OPTIONS");
 
     kw_as = &IdentTable.get("as");
@@ -1334,6 +1335,7 @@
   IdentifierInfo *kw_CF_OPTIONS;
   IdentifierInfo *kw_NS_CLOSED_ENUM;
   IdentifierInfo *kw_NS_ENUM;
+  IdentifierInfo *kw_NS_ERROR_ENUM;
   IdentifierInfo *kw_NS_OPTIONS;
   IdentifierInfo *kw___except;
   IdentifierInfo *kw___has_include;
diff --git a/clang/unittests/Format/FormatTestObjC.cpp b/clang/unittests/Format/FormatTestObjC.cpp
--- a/clang/unittests/Format/FormatTestObjC.cpp
+++ b/clang/unittests/Format/FormatTestObjC.cpp
@@ -89,6 +89,11 @@
   ASSERT_TRUE((bool)Style);
   EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
 
+  Style =
+      getStyle("{}", "a.h", "none", "typedef NS_ERROR_ENUM(int, Foo) {};\n");
+  ASSERT_TRUE((bool)Style);
+  EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
+
   Style = getStyle("{}", "a.h", "none", "enum Foo {};");
   ASSERT_TRUE((bool)Style);
   EXPECT_EQ(FormatStyle::LK_Cpp, Style->Language);