diff --git a/synapse/config/consent_config.py b/synapse/config/consent_config.py
index ddcd305f4c..da39636d61 100644
--- a/synapse/config/consent_config.py
+++ b/synapse/config/consent_config.py
@@ -18,6 +18,8 @@ from ._base import Config
 DEFAULT_CONFIG = """\
 # User Consent configuration
 #
+# for a detailed instruction, see https://github.com/matrix-org/synapse/blob/master/docs/consent_tracking.md
+# 
 # Parts of this section are required if enabling the 'consent' resource under
 # 'listeners', in particular 'template_dir' and 'version'.
 #