1 files changed, 2 insertions, 1 deletions
diff --git a/python/google/protobuf/pyext/extension_dict.cc b/python/google/protobuf/pyext/extension_dict.cc
index 8ebbb27c..9c9b4178 100644
--- a/python/google/protobuf/pyext/extension_dict.cc
+++ b/python/google/protobuf/pyext/extension_dict.cc
@@ -123,7 +123,8 @@ PyObject* subscript(ExtensionDict* self, PyObject* key) {
   if (descriptor->label() == FieldDescriptor::LABEL_REPEATED) {
     if (descriptor->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
       PyObject *message_class = cdescriptor_pool::GetMessageClass(
-          GetDescriptorPool(), descriptor->message_type());
+          cmessage::GetDescriptorPoolForMessage(self->parent),
+          descriptor->message_type());
       if (message_class == NULL) {
         return NULL;
       }