diff --git a/source/param/loadparm.c b/source/param/loadparm.c
index de91e7e2a51..831aab0305e 100644
--- a/source/param/loadparm.c
+++ b/source/param/loadparm.c
@@ -1584,7 +1584,7 @@ FN_GLOBAL_STRING(lp_wins_hook, &Globals.szWINSHook)
 FN_GLOBAL_STRING(lp_wins_partners, &Globals.szWINSPartners)
 FN_GLOBAL_STRING(lp_template_homedir, &Globals.szTemplateHomedir)
 FN_GLOBAL_STRING(lp_template_shell, &Globals.szTemplateShell)
-FN_GLOBAL_STRING(lp_winbind_separator, &Globals.szWinbindSeparator)
+FN_GLOBAL_CONST_STRING(lp_winbind_separator, &Globals.szWinbindSeparator)
 FN_GLOBAL_STRING(lp_acl_compatibility, &Globals.szAclCompat)
 FN_GLOBAL_BOOL(lp_winbind_enum_users, &Globals.bWinbindEnumUsers)
 FN_GLOBAL_BOOL(lp_winbind_enum_groups, &Globals.bWinbindEnumGroups)