diff --git a/mbtrack2/tracking/feedback.py b/mbtrack2/tracking/feedback.py
index ae813874a7b2bf64d9fa60728487030473d807d0..351402cfcd60e887ed9f0c84a308ebe8db27c454 100644
--- a/mbtrack2/tracking/feedback.py
+++ b/mbtrack2/tracking/feedback.py
@@ -212,7 +212,7 @@ class FIRDamper(Element):
         H_FIR = 0
         for k in range(len(self.coef)):
             H_FIR += self.coef[k] * np.exp(-1j * 2 * np.pi * (k) * tune)
-        latency = np.exp(-1j                 * 2 * np.pi  *     tune          *          self.turn_delay)
+        latency = np.exp(-1j * 2 * np.pi * tune * self.turn_delay)
         H_tot = H_FIR * latency
 
         gain = np.abs(H_tot)