diff --git a/pybind11_protobuf/enum_type_caster.h b/pybind11_protobuf/enum_type_caster.h
index 4b94506..5765233 100644
--- a/pybind11_protobuf/enum_type_caster.h
+++ b/pybind11_protobuf/enum_type_caster.h
@@ -45,7 +45,7 @@ struct enum_type_caster {
   using base_caster = pybind11::detail::make_caster<T>;
 
  public:
-  static constexpr auto name = pybind11::detail::_<EnumType>();
+  static constexpr auto name = pybind11::detail::const_name<EnumType>();
 
   // cast converts from C++ -> Python
   static pybind11::handle cast(EnumType src,
diff --git a/pybind11_protobuf/proto_caster_impl.h b/pybind11_protobuf/proto_caster_impl.h
index 398df2b..3508ee6 100644
--- a/pybind11_protobuf/proto_caster_impl.h
+++ b/pybind11_protobuf/proto_caster_impl.h
@@ -190,7 +190,7 @@ struct proto_caster : public proto_caster_load_impl<ProtoType>,
   using Loader::value;
 
  public:
-  static constexpr auto name = pybind11::detail::_<ProtoType>();
+  static constexpr auto name = pybind11::detail::const_name<ProtoType>();
 
   // cast converts from C++ -> Python
   //
diff --git a/pybind11_protobuf/wrapped_proto_caster.h b/pybind11_protobuf/wrapped_proto_caster.h
index 347be2c..d45282f 100644
--- a/pybind11_protobuf/wrapped_proto_caster.h
+++ b/pybind11_protobuf/wrapped_proto_caster.h
@@ -138,7 +138,7 @@ struct wrapped_proto_caster : public pybind11_protobuf::proto_caster_load_impl<
   using pybind11_protobuf::native_cast_impl::cast_impl;
 
  public:
-  static constexpr auto name = pybind11::detail::_<WrappedProtoType>();
+  static constexpr auto name = pybind11::detail::const_name<WrappedProtoType>();
 
   // cast converts from C++ -> Python
   static pybind11::handle cast(WrappedProtoType src,
@@ -244,7 +244,8 @@ template <typename ProtoType>
 struct wrapped_proto_vector_caster {
   static constexpr auto name =
       (pybind11::detail::const_name("List[") +
-       pybind11::detail::_<ProtoType>() + pybind11::detail::const_name("]"));
+       pybind11::detail::const_name<ProtoType>() +
+       pybind11::detail::const_name("]"));
 
   // cast converts from Python -> C++
   bool load(pybind11::handle src, bool convert) {