diff --git a/lang/python/src/core.py b/lang/python/src/core.py
index be3ebd11..81131f21 100644
--- a/lang/python/src/core.py
+++ b/lang/python/src/core.py
@@ -1396,6 +1396,7 @@ class Data(GpgmeWrapper):
             'gpgme_data_release_and_get_mem',
             'gpgme_data_get_encoding',
             'gpgme_data_get_file_name',
+            'gpgme_data_set_flag',
             'gpgme_data_identify',
         }