diff --git a/src/databricks/sql/__init__.py b/src/databricks/sql/__init__.py
index 493ffe3a2..190fa5ee1 100644
--- a/src/databricks/sql/__init__.py
+++ b/src/databricks/sql/__init__.py
@@ -3,6 +3,7 @@
 from databricks.sql.exc import *
 
 # PEP 249 module globals
+# (see https://peps.python.org/pep-0249/#globals)
 apilevel = "2.0"
 threadsafety = 1  # Threads may share the module, but not connections.