diff --git a/nautilus_core/adapters/src/tardis/python/config.rs b/nautilus_core/adapters/src/tardis/python/config.rs
index 3b187103440..00973a8cc8f 100644
--- a/nautilus_core/adapters/src/tardis/python/config.rs
+++ b/nautilus_core/adapters/src/tardis/python/config.rs
@@ -21,7 +21,7 @@ use crate::tardis::{machine::InstrumentMiniInfo, parse::bar_spec_to_tardis_trade
 #[pymethods]
 impl InstrumentMiniInfo {
     #[new]
-    fn py_new(
+    const fn py_new(
         instrument_id: InstrumentId,
         price_precision: u8,
         size_precision: u8,