diff --git a/crates/ml/tests/gpu_per_integration_test.rs b/crates/ml/tests/gpu_per_integration_test.rs
index 148cff5ec..3866713fb 100644
--- a/crates/ml/tests/gpu_per_integration_test.rs
+++ b/crates/ml/tests/gpu_per_integration_test.rs
@@ -315,7 +315,7 @@ fn test_gpu_per_ring_buffer_overwrites_correctly() {
 
     // Download u32 indices to host for range validation
     let mut indices_host = vec![0_u32; 20];
-    stream.memcpy_dtoh(buf.sample_indices_ref(), &mut indices_host).unwrap();
+    stream.memcpy_dtoh(&buf.sample_indices_ref(), &mut indices_host).unwrap();
 
     let idx_min = *indices_host.iter().min().unwrap();
     let idx_max = *indices_host.iter().max().unwrap();