diff --git a/slapd/README.md b/slapd/README.md
index 14f5eab6aa48835a1880278cb1e4b5e7ffe0d887..6beca9eece3b881a04e141f4b9e28c5160afafd0 100644
--- a/slapd/README.md
+++ b/slapd/README.md
@@ -15,7 +15,7 @@ Name | Description | Default value
 `LDAP_ROOTPASS` | Root password.
 `LDAP_DOMAIN` | Domain.
 `LDAP_ORGANIZATION` | Organization.
-`SLAPD_DEBUG_LEVEL` | The `slapd` debug/ log level.
+`SLAPD_DEBUG_LEVEL` | The `slapd` debug/ log level. | `stats,stats2,none`
 `SSL_CERT_FILE` | Location of the SSL certificate file.
 `SSL_KEY_FILE` | Location of the SSL key file.
 `SSL_CA_FILE` | Location of the SSL certificate authority file.