Index: include/clang/Basic/Attr.td
===================================================================
--- include/clang/Basic/Attr.td
+++ include/clang/Basic/Attr.td
@@ -1618,7 +1618,7 @@
 def Uuid : InheritableAttr {
   let Spellings = [Declspec<"uuid">, Microsoft<"uuid">];
   let Args = [StringArgument<"Guid">];
-//  let Subjects = SubjectList<[CXXRecord]>;
+  let Subjects = SubjectList<[CXXRecord, Enum], WarnDiag, "ExpectedEnumOrClass">;
   let LangOpts = [MicrosoftExt, Borland];
   let Documentation = [Undocumented];
 }
Index: include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- include/clang/Basic/DiagnosticSemaKinds.td
+++ include/clang/Basic/DiagnosticSemaKinds.td
@@ -2633,7 +2633,8 @@
   "|variables, enums, fields and typedefs"
   "|functions, methods, enums, and classes"
   "|structs, classes, variables, functions, and inline namespaces"
-  "|variables, functions, methods, types, enumerations, enumerators, labels, and non-static data members}1">,
+  "|variables, functions, methods, types, enumerations, enumerators, labels, and non-static data members"
+  "|classes, enums}1">,
   InGroup<IgnoredAttributes>;
 def err_attribute_wrong_decl_type : Error<warn_attribute_wrong_decl_type.Text>;
 def warn_type_attribute_wrong_type : Warning<
Index: include/clang/Sema/AttributeList.h
===================================================================
--- include/clang/Sema/AttributeList.h
+++ include/clang/Sema/AttributeList.h
@@ -924,7 +924,8 @@
   ExpectedVariableEnumFieldOrTypedef,
   ExpectedFunctionMethodEnumOrClass,
   ExpectedStructClassVariableFunctionOrInlineNamespace,
-  ExpectedForMaybeUnused
+  ExpectedForMaybeUnused,
+  ExpectedEnumOrClass
 };
 
 }  // end namespace clang
Index: lib/Sema/SemaDeclAttr.cpp
===================================================================
--- lib/Sema/SemaDeclAttr.cpp
+++ lib/Sema/SemaDeclAttr.cpp
@@ -4666,9 +4666,9 @@
     return;
   }
 
-  if (!isa<CXXRecordDecl>(D)) {
+  if (!(isa<CXXRecordDecl>(D) || isa<EnumDecl>(D))) {
     S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
-      << Attr.getName() << ExpectedClass;
+      << Attr.getName() << ExpectedEnumOrClass;
     return;
   }
 
Index: lib/Sema/SemaExprCXX.cpp
===================================================================
--- lib/Sema/SemaExprCXX.cpp
+++ lib/Sema/SemaExprCXX.cpp
@@ -520,7 +520,7 @@
   else if (QT->isArrayType())
     Ty = Ty->getBaseElementTypeUnsafe();
 
-  const auto *RD = Ty->getAsCXXRecordDecl();
+  const auto *RD = Ty->getAsTagDecl();
   if (!RD)
     return;
 
Index: test/Parser/MicrosoftExtensions.cpp
===================================================================
--- test/Parser/MicrosoftExtensions.cpp
+++ test/Parser/MicrosoftExtensions.cpp
@@ -65,6 +65,10 @@
 struct
 struct_with_uuid2 {} ;
 
+enum __declspec(uuid("000000A0-0000-0000-C000-000000000046"))
+enum_with_uuid { };
+enum enum_without_uuid { };
+
 int uuid_sema_test()
 {
    struct_with_uuid var_with_uuid[1];
@@ -81,6 +85,15 @@
    __uuidof(const struct_with_uuid[1][1]);
    __uuidof(const struct_with_uuid*[1][1]); // expected-error {{cannot call operator __uuidof on a type with no GUID}}
 
+   __uuidof(enum_with_uuid);
+   __uuidof(enum_without_uuid); // expected-error {{cannot call operator __uuidof on a type with no GUID}}
+   __uuidof(enum_with_uuid*);
+   __uuidof(enum_without_uuid*); // expected-error {{cannot call operator __uuidof on a type with no GUID}}
+   __uuidof(enum_with_uuid[1]);
+   __uuidof(enum_with_uuid*[1]); // expected-error {{cannot call operator __uuidof on a type with no GUID}}
+   __uuidof(const enum_with_uuid[1][1]);
+   __uuidof(const enum_with_uuid*[1][1]); // expected-error {{cannot call operator __uuidof on a type with no GUID}}
+
    __uuidof(var_with_uuid);
    __uuidof(var_without_uuid);// expected-error {{cannot call operator __uuidof on a type with no GUID}}
    __uuidof(var_with_uuid[1]);