diff --git a/pandas/core/api.py b/pandas/core/api.py
index 8a624da362976..bff42090d689e 100644
--- a/pandas/core/api.py
+++ b/pandas/core/api.py
@@ -69,7 +69,7 @@ def groupby(*args, **kwargs):
     return args[0].groupby(*args[1:], **kwargs)
 
 
-# deprecation, xref
+# Deprecation: xref gh-16747
 class TimeGrouper(object):
 
     def __new__(cls, *args, **kwargs):