diff --git a/unix_integration/resolver/src/unix_config.rs b/unix_integration/resolver/src/unix_config.rs
index 306f38298..d25fe3338 100644
--- a/unix_integration/resolver/src/unix_config.rs
+++ b/unix_integration/resolver/src/unix_config.rs
@@ -71,6 +71,7 @@ struct KanidmConfigV2 {
     conn_timeout: Option<u64>,
     request_timeout: Option<u64>,
     pam_allowed_login_groups: Option<Vec<String>>,
+    #[serde(default)]
     map_group: Vec<GroupMap>,
 }