diff --git a/io_scene_psk_psa/psk/import_/operators.py b/io_scene_psk_psa/psk/import_/operators.py
index e90b44c..3ebc084 100644
--- a/io_scene_psk_psa/psk/import_/operators.py
+++ b/io_scene_psk_psa/psk/import_/operators.py
@@ -82,6 +82,7 @@ class PSK_OT_import(Operator, ImportHelper):
         soft_min=1.0,
         name='Bone Length',
         options=empty_set,
+        subtype='DISTANCE',
         description='Length of the bones'
     )
     should_import_shape_keys: BoolProperty(