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
@@ -679,6 +679,7 @@
     kw_of = &IdentTable.get("of");
     kw_CF_ENUM = &IdentTable.get("CF_ENUM");
     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_OPTIONS = &IdentTable.get("NS_OPTIONS");
 
@@ -789,6 +790,7 @@
   IdentifierInfo *kw_of;
   IdentifierInfo *kw_CF_ENUM;
   IdentifierInfo *kw_CF_OPTIONS;
+  IdentifierInfo *kw_NS_CLOSED_ENUM;
   IdentifierInfo *kw_NS_ENUM;
   IdentifierInfo *kw_NS_OPTIONS;
   IdentifierInfo *kw___except;
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1215,7 +1215,8 @@
     case tok::kw_typedef:
       nextToken();
       if (FormatTok->isOneOf(Keywords.kw_NS_ENUM, Keywords.kw_NS_OPTIONS,
-                             Keywords.kw_CF_ENUM, Keywords.kw_CF_OPTIONS))
+                             Keywords.kw_CF_ENUM, Keywords.kw_CF_OPTIONS,
+                             Keywords.kw_NS_CLOSED_ENUM))
         parseEnum();
       break;
     case tok::kw_struct:
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -1716,6 +1716,8 @@
 
 TEST_F(FormatTest, FormatsNSEnums) {
   verifyGoogleFormat("typedef NS_ENUM(NSInteger, SomeName) { AAA, BBB }");
+  verifyGoogleFormat(
+      "typedef NS_CLOSED_ENUM(NSInteger, SomeName) { AAA, BBB }");
   verifyGoogleFormat("typedef NS_ENUM(NSInteger, MyType) {\n"
                      "  // Information about someDecentlyLongValue.\n"
                      "  someDecentlyLongValue,\n"
@@ -1724,6 +1726,14 @@
                      "  // Information about aThirdDecentlyLongValue.\n"
                      "  aThirdDecentlyLongValue\n"
                      "};");
+  verifyGoogleFormat("typedef NS_CLOSED_ENUM(NSInteger, MyType) {\n"
+                     "  // Information about someDecentlyLongValue.\n"
+                     "  someDecentlyLongValue,\n"
+                     "  // Information about anotherDecentlyLongValue.\n"
+                     "  anotherDecentlyLongValue,\n"
+                     "  // Information about aThirdDecentlyLongValue.\n"
+                     "  aThirdDecentlyLongValue\n"
+                     "};");
   verifyGoogleFormat("typedef NS_OPTIONS(NSInteger, MyType) {\n"
                      "  a = 1,\n"
                      "  b = 2,\n"
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
@@ -118,6 +118,11 @@
   ASSERT_TRUE((bool)Style);
   EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
 
+  Style = getStyle("{}", "a.h", "none",
+                   "typedef NS_CLOSED_ENUM(NSInteger, 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);