diff --git a/clang/include/clang/Serialization/ASTWriter.h b/clang/include/clang/Serialization/ASTWriter.h
index de69f99003d827..16ab9583f8ed8e 100644
--- a/clang/include/clang/Serialization/ASTWriter.h
+++ b/clang/include/clang/Serialization/ASTWriter.h
@@ -763,8 +763,9 @@ 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;