diff --git a/src/bin/lockin-internal.rs b/src/bin/lockin-internal.rs
index 1e7ebc0..ee9da2f 100644
--- a/src/bin/lockin-internal.rs
+++ b/src/bin/lockin-internal.rs
@@ -94,9 +94,9 @@ const APP: () = {
             * 2; // Full scale assuming the 2f component is gone.
 
         // Convert to DAC data.
-        for i in 0..dac_samples[1].len() {
+        for (i, data) in DAC_SEQUENCE.iter().enumerate() {
             // DAC0 always generates a fixed sinusoidal output.
-            dac_samples[0][i] = DAC_SEQUENCE[i] as u16 ^ 0x8000;
+            dac_samples[0][i] = *data as u16 ^ 0x8000;
             dac_samples[1][i] = (output.arg() >> 16) as u16 ^ 0x8000;
         }
     }