Index: lib/Sema/SemaTemplate.cpp
===================================================================
--- lib/Sema/SemaTemplate.cpp
+++ lib/Sema/SemaTemplate.cpp
@@ -2352,6 +2352,9 @@
                                                 ClassTemplate->getLocation(),
                                                      ClassTemplate,
                                                      Converted, nullptr);
+      if (auto *attr = ClassTemplate->getTemplatedDecl()
+                           ->getAttr<clang::DeprecatedAttr>())
+        Decl->addAttr(attr->clone(Context));
       ClassTemplate->AddSpecialization(Decl, InsertPos);
       if (ClassTemplate->isOutOfLine())
         Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext());
Index: test/CXX/dcl.dcl/dcl.attr/dcl.attr.deprecated/p1.cpp
===================================================================
--- test/CXX/dcl.dcl/dcl.attr/dcl.attr.deprecated/p1.cpp
+++ test/CXX/dcl.dcl/dcl.attr/dcl.attr.deprecated/p1.cpp
@@ -23,7 +23,8 @@
 X<char> x1;
 X<int> x2; // expected-warning {{'X<int>' is deprecated}}
 
-template <typename T> class [[deprecated]] X2 {};
+template <typename T> class [[deprecated]] X2 {}; //expected-note {{'X2<char>' has been explicitly marked deprecated here}}
 template <> class X2<int> {};
-X2<char> x3; // FIXME: no warning!
-X2<int> x4;
+X2<char> x3; // expected-warning {{'X2<char>' is deprecated}}
+X2<int> x4; // No warning, the specialization removes it.
+