diff --git a/crates/ml/tests/sp5_producer_unit_tests.rs b/crates/ml/tests/sp5_producer_unit_tests.rs
index 116a03ed8..a9e607db8 100644
--- a/crates/ml/tests/sp5_producer_unit_tests.rs
+++ b/crates/ml/tests/sp5_producer_unit_tests.rs
@@ -209,7 +209,7 @@ fn sp5_pearl_1_atom_headroom_bootstrap_and_controller_step() {
     // Layout: branch b at scratch[71 + b*4 + {0,1,2,3}] = {mean, max_abs_dev, var, entropy}
     let scratch_buf = unsafe { MappedF32Buffer::new(SCRATCH_ATOM_OUT + 16) }
         .expect("alloc scratch_buf");
-    let scratch_data: Vec<f32> = (0..scratch_buf.len())
+    let scratch_data: Vec<f32> = (0..scratch_buf.len)
         .map(|i| {
             let rel = i as i32 - SCRATCH_Q_STATS as i32;
             if rel >= 0 && rel < 16 {