diff --git a/src/models/tree.rs b/src/models/tree.rs
index 3b4ab3c..2e4df0f 100644
--- a/src/models/tree.rs
+++ b/src/models/tree.rs
@@ -27,7 +27,8 @@ impl Tree {
         Tree {
             hash: "".to_string(),
             entries: Vec::new(),
-        }
+        };
+        unimplemented!("Tree::new");
     }
 
     pub fn load(hash: &String) -> Tree {