diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index e9531322cd6..51c9b01884b 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -346,6 +346,7 @@
 #syslog_ident = 'postgres'
 
 # This is only relevant when logging to eventlog (win32):
+# (change requires restart)
 #event_source = 'PostgreSQL'
 
 # - When to Log -