diff --git a/radix-engine/src/transaction/system_structure.rs b/radix-engine/src/transaction/system_structure.rs
index ef4fdb923b1..e8fc1801f3c 100644
--- a/radix-engine/src/transaction/system_structure.rs
+++ b/radix-engine/src/transaction/system_structure.rs
@@ -6,7 +6,6 @@ use crate::track::{
     TrackedNode, TrackedSubstateValue,
 };
 use crate::types::*;
-use radix_engine_interface::api::ObjectModuleId;
 use radix_engine_interface::blueprints::package::*;
 use radix_engine_store_interface::interface::SubstateDatabase;