diff --git a/Model.py b/Model.py
index ef43e9c226b622511178c70d9d88c424d7cf4fa9..fdb8ba585f700ed26c95a091ae5bb6aab1e0a210 100644
--- a/Model.py
+++ b/Model.py
@@ -145,7 +145,7 @@ def Alpha(tau_R, tau_Ap, t_gate, p_Ap):
 
 @njit
 def dAlpha(tau_R, tau_Ap, t_gate, p_Ap, dtau_Ap, dp_Ap):
-    dalphadtauAp = p_Ap*((t_gate*(-tau_Ap - tau_R*(1 - np.exp(-t_gate/tau_R)))*np.exp(-t_gate/tau_Ap))/tau_Ap**2 + 1 - np.exp(-t_gate/tau_Ap))/(tau_Ap+tau_R) - p_Ap*(tau_Ap - (tau_Ap + tau_R*(1 - exp(-t_gate/tau_R)))*np.exp(-t_gate/tau_Ap))/(tau_Ap + tau_R)**2
+    dalphadtauAp = p_Ap*((t_gate*(-tau_Ap - tau_R*(1 - np.exp(-t_gate/tau_R)))*np.exp(-t_gate/tau_Ap))/tau_Ap**2 + 1 - np.exp(-t_gate/tau_Ap))/(tau_Ap+tau_R) - p_Ap*(tau_Ap - (tau_Ap + tau_R*(1 - np.exp(-t_gate/tau_R)))*np.exp(-t_gate/tau_Ap))/(tau_Ap + tau_R)**2
     
     dalphadpAp = (tau_Ap - (tau_Ap + tau_R*(1 - np.exp(-t_gate/tau_R)))*np.exp(-t_gate/tau_Ap))/(tau_Ap + tau_R)