diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 96f48d9e52..1906b5a33c 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -379,6 +379,7 @@
 #syslog_split_messages = on
 
 # This is only relevant when logging to eventlog (win32):
+# (change requires restart)
 #event_source = 'PostgreSQL'
 
 # - When to Log -