diff --git a/src/zk/gadget/native_range_check.rs b/src/zk/gadget/native_range_check.rs
index f58a817c5..0ba2ab80e 100644
--- a/src/zk/gadget/native_range_check.rs
+++ b/src/zk/gadget/native_range_check.rs
@@ -114,6 +114,7 @@ impl<const WINDOW_SIZE: usize, const NUM_BITS: usize, const NUM_WINDOWS: usize>
             .collect()
     }
 
+    // TODO: strict bool
     pub fn decompose(
         &self,
         region: &mut Region<'_, pallas::Base>,