pyderasn.py | 4 ++--

diff --git a/pyderasn.py b/pyderasn.py
index 3ba7264acecca33a7f96f1607d171952e8f542caacda2da5b2134bbea49dd2f4..6a158a324bf3581b96bd89972355bd53a4946de68104c5f385bc034d19a00cd8 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -4504,7 +4504,7 @@                 if spec.optional:
                     continue
                 raise
 
-            defined = get_def_by_path(ctx.get("defines", ()), sub_decode_path)
+            defined = get_def_by_path(ctx.get("_defines", ()), sub_decode_path)
             if defined is not None:
                 defined_by, defined_spec = defined
                 if issubclass(value.__class__, SequenceOf):
@@ -4576,7 +4576,7 @@             if spec_defines is not None and len(spec_defines) > 0:
                 for rel_path, schema in spec_defines:
                     defined = schema.get(value, None)
                     if defined is not None:
-                        ctx.setdefault("defines", []).append((
+                        ctx.setdefault("_defines", []).append((
                             abs_decode_path(sub_decode_path[:-1], rel_path),
                             (value, defined),
                         ))