diff --git a/sepaxml/shared.py b/sepaxml/shared.py
index 6bdff06..114eded 100644
--- a/sepaxml/shared.py
+++ b/sepaxml/shared.py
@@ -51,8 +51,8 @@ def __init__(self, config, schema, clean=True):
 
                 self._config['name'] = unidecode(self._config['name'])[:70]
 
-                if self._config.get('msg_id'):
-                    self.msg_id = self._config['msg_id'][:35]
+            if self._config.get('msg_id'):
+                self.msg_id = self._config['msg_id'][:35]
 
         self._prepare_document()
         self._create_header()