diff --git a/src/laser_diode/laser_diode.rs b/src/laser_diode/laser_diode.rs
index 7282ce3..bcb687d 100644
--- a/src/laser_diode/laser_diode.rs
+++ b/src/laser_diode/laser_diode.rs
@@ -133,7 +133,7 @@ impl LdDrive{
             -Settings::LD_CURRENT_STEP_SIZE 
         };
         
-        for _ in (0..num_of_step.abs()).rev() {
+        for _ in 0..num_of_step.abs() {
             prev_i_set = prev_i_set + current_step;
             let _ = self.ctrl.set_i(prev_i_set, Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX);
             sleep(Settings::LD_CURRENT_TIME_STEP_MS);