diff --git a/dsp/tests/lockin.rs b/dsp/tests/lockin.rs
index f48eab4..0f4450a 100644
--- a/dsp/tests/lockin.rs
+++ b/dsp/tests/lockin.rs
@@ -60,7 +60,7 @@ impl Lockin {
         let mut last = Complex::default();
 
         for s in input.iter() {
-            let m = cossin(-(phase as i32));
+            let m = cossin((phase as i32).wrapping_neg());
             phase = phase.wrapping_add(frequency);
 
             last = Complex(
diff --git a/src/main.rs b/src/main.rs
index eaf3979..0226495 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1026,7 +1026,7 @@ const APP: () = {
 
         dac0.iter_mut().zip(dac1.iter_mut()).enumerate().for_each(
             |(i, (d0, d1))| {
-                let m = cossin(-(phase as i32));
+                let m = cossin((phase as i32).wrapping_neg());
                 phase = phase.wrapping_add(frequency);
 
                 let signal = Complex(