diff --git a/clang/include/clang/Serialization/ASTWriter.h b/clang/include/clang/Serialization/ASTWriter.h
index 16ab9583f8ed8..de69f99003d82 100644
--- a/clang/include/clang/Serialization/ASTWriter.h
+++ b/clang/include/clang/Serialization/ASTWriter.h
@@ -763,9 +763,8 @@ class ASTWriter : public ASTDeserializationListener,
       return DeclDependentNonTemplateCXXMethodAbbrev;
     case FunctionDecl::TK_DependentFunctionTemplateSpecialization:
       return DeclDependentSpecializationCXXMethodAbbrev;
-    default:
-      llvm_unreachable("Unknwon Template Kind!");
     }
+    llvm_unreachable("Unknwon Template Kind!");
   }
   unsigned getDeclTemplateTypeParmAbbrev() const {
     return DeclTemplateTypeParmAbbrev;