diff --git a/hed/schema/schema_io/base2schema.py b/hed/schema/schema_io/base2schema.py
index 68251c01a..5daca8889 100644
--- a/hed/schema/schema_io/base2schema.py
+++ b/hed/schema/schema_io/base2schema.py
@@ -224,7 +224,7 @@ def fix_extras(self):
         for key, extra in self._schema.extras.items():
             self._schema.extras[key] = extra.rename(columns=df_constants.EXTRAS_CONVERSIONS)
             if key in df_constants.extras_column_dict:
-               self._schema.extras[key] = SchemaLoader.fix_extra(self._schema, key)
+               self._schema.extras[key] = self.fix_extra(self._schema, key)
 
     @staticmethod
     def fix_extra(schema, key):