diff --git a/deepmd/descriptor/loc_frame.py b/deepmd/descriptor/loc_frame.py
index a664384ba6..3a178ff494 100644
--- a/deepmd/descriptor/loc_frame.py
+++ b/deepmd/descriptor/loc_frame.py
@@ -9,6 +9,7 @@
 from deepmd.utils.sess import run_sess
 from .descriptor import Descriptor
 
+@Descriptor.register("loc_frame")
 class DescrptLocFrame (Descriptor) :
     """Defines a local frame at each atom, and the compute the descriptor as local
     coordinates under this frame.
diff --git a/deepmd/entrypoints/train.py b/deepmd/entrypoints/train.py
index 98090c18af..f3a9faca46 100755
--- a/deepmd/entrypoints/train.py
+++ b/deepmd/entrypoints/train.py
@@ -337,7 +337,7 @@ def update_sel(jdata):
     if descrpt_data['type'] == 'hybrid':
         for ii in range(len(descrpt_data['list'])):
             descrpt_data['list'][ii] = update_one_sel(jdata, descrpt_data['list'][ii])
-    else:
+    elif descrpt_data['type'] != 'loc_frame':
         descrpt_data = update_one_sel(jdata, descrpt_data)
     jdata['model']['descriptor'] = descrpt_data
     return jdata