diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index 359fa8183462feb256644c0a2020468c040bbe59..07d0c406b99456d9677181365fa67db95c27c180 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -2599,6 +2599,7 @@ class IFSsimulator():
         data[data < val] = data[data < val]-beta*data[data < val]**2
         return data
     ##########################################################################
+
     def applyReadoutNoise(self):
         """