diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 5246fc5b20..e1b65256a4 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -2042,7 +2042,7 @@ static struct config_int ConfigureNamesInt[] =
 	},
 
 	{
-		{"commit_delay", PGC_USERSET, WAL_SETTINGS,
+		{"commit_delay", PGC_SUSET, WAL_SETTINGS,
 			gettext_noop("Sets the delay in microseconds between transaction commit and "
 						 "flushing WAL to disk."),
 			NULL