diff --git a/lark/parse_tree_builder.py b/lark/parse_tree_builder.py
index 888cc736..a6003a92 100644
--- a/lark/parse_tree_builder.py
+++ b/lark/parse_tree_builder.py
@@ -73,6 +73,8 @@ def _pp_get_meta(self, children):
                     return c.meta
             elif isinstance(c, Token):
                 return c
+            elif hasattr(c, '__lark_meta__'):
+                return c.__lark_meta__()
 
 def make_propagate_positions(option):
     if callable(option):