diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index 29cd28ab8e5a09b7e465185e6f92c6c9794747d4..eddeb9c8f222983e9cf2636b970c142819df5546 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -2799,7 +2799,7 @@ class IFSsimulator():
                   or self.information['bias1_r'] > 2000 or self.information['bias1_r'] < 100
                   or self.information['bias2_r'] > 2000 or self.information['bias2_r'] < 100
                   or self.information['bias3_r'] > 2000 or self.information['bias3_r'] < 100
-                  or self.information['bias4_r'] > 2000 or self.information['bias4_r'] < 100
+                  or self.information['bias4_r'] > 2000 or self.information['bias4_r'] < 100)
                   
         if checkV:
             self.log.error(