diff --git a/roles/ldap/server/templates/slapd.conf.j2 b/roles/ldap/server/templates/slapd.conf.j2
index 2deba52..9ce4c21 100644
--- a/roles/ldap/server/templates/slapd.conf.j2
+++ b/roles/ldap/server/templates/slapd.conf.j2
@@ -107,6 +107,8 @@ updateref ldaps://ldap01.foo.sh
 index entryCSN,entryUUID,objectClass eq
 # for kerberos kdc
 index krbPrincipalName eq
+# for username lookups
+index uid eq
 
 # map root user to manager when authenticating via socket
 authz-regexp