diff --git a/src/node/mod.rs b/src/node/mod.rs
index ed5fd31..987440a 100644
--- a/src/node/mod.rs
+++ b/src/node/mod.rs
@@ -29,7 +29,7 @@ impl Node {
         return self.handler.run(inputs);
     }
     pub fn modify_tree<'a>(&'a mut self) -> NodeModifier<'a> {
-        NodeModifier::from_random(self)
+        NodeModifier::from_random(self, None)
     }
     pub fn number(n: f64) -> Node {
         Node {