diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index fa6c0eaa801..f2cb7de03f9 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -131,6 +131,7 @@
 					#   windows
 					#   mmap
 					# use none to disable dynamic shared memory
+					# (change requires restart)
 
 # - Disk -