diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 63a678f1fd7..d509bd45b26 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -352,6 +352,7 @@
 #syslog_ident = 'postgres'
 
 # This is only relevant when logging to eventlog (win32):
+# (change requires restart)
 #event_source = 'PostgreSQL'
 
 # - When to Log -