diff --git a/docker/ss-atlas/internal/ldap/groups.go b/docker/ss-atlas/internal/ldap/groups.go
index 6d92ec5..819a105 100644
--- a/docker/ss-atlas/internal/ldap/groups.go
+++ b/docker/ss-atlas/internal/ldap/groups.go
@@ -38,9 +38,9 @@ func (c *Client) EnsureGroup(displayName string) error {
 	if err == nil {
 		return nil
 	}
-	// Group missing: try to create via GraphQL (LLDAP mutation).
-	query := `mutation($displayName: String!) { createGroup(displayName: $displayName) { id } }`
-	data, err := c.gql.exec(query, map[string]any{"displayName": displayName})
+	// Group missing: try to create via GraphQL (LLDAP mutation uses "name").
+	query := `mutation($name: String!) { createGroup(name: $name) { id } }`
+	data, err := c.gql.exec(query, map[string]any{"name": displayName})
 	if err != nil {
 		log.Printf("lldap createGroup %q failed: %v (create group manually in LLDAP admin if needed)", displayName, err)
 		return err