diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index fbd01914d5..8a3e7a95cd 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -77,6 +77,9 @@ def log_failure(
 # Version string with git info. Computed here once so that we don't invoke git multiple
 # times.
 SYNAPSE_VERSION = get_distribution_version_string("matrix-synapse", __file__)
+"""
+Version string with git info.
+"""
 
 
 class ExceptionBundle(Exception):