diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index 8d08e6a9032d821a9bbdf7e77e96b6a83ed72b33..cda5b279c8d0635fab727f7d08c4a811d1326701 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -2064,6 +2064,10 @@ class MCIsimulator():
             
             if nlayccd %100 == 0:
                 self.log.info('Star number on CCD is = %i' % (nlayccd))
+                
+            if self.debug:
+                self.log.info('Star number on CCD is = %i' % (nlayccd))
+                
             ######
             st_phot_C1.append(intscales['g'])
             st_phot_C2.append(intscales['r'])