diff --git a/src/laser_diode/ld_ctrl.rs b/src/laser_diode/ld_ctrl.rs
index 10ab455..1d17c22 100644
--- a/src/laser_diode/ld_ctrl.rs
+++ b/src/laser_diode/ld_ctrl.rs
@@ -81,7 +81,7 @@ impl LdCtrl {
         let value = ((voltage / dac_out_v_max).get::<ratio>()
             * (max5719::MAX_VALUE as f64)) as u32;
         self.phy.dac.set(value).unwrap();
-        voltage
+        value as f64 * dac_out_v_max / max5719::MAX_VALUE as f64
     }
 
     pub fn set_i(&mut self, current: ElectricCurrent, transimpedance: TransimpedanceUnit, dac_out_v_max: ElectricPotential) -> ElectricCurrent {