diff --git a/src/main.rs b/src/main.rs
index 28679bf..3f1a250 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -260,6 +260,6 @@ async fn check(State(app_state): State<AppState>, Query(params): Query<HashMap<S
 
     return (
         StatusCode::OK,
-        format!("nixos_current_system_valid{{}} {}\n", status)
+        format!("nixos_current_system_is_sync{{}} {}\n", status)
     ).into_response();
 }