diff --git a/LArCalorimeter/LArConfiguration/python/LArMonitoringConfig.py b/LArCalorimeter/LArConfiguration/python/LArMonitoringConfig.py
index 5c0aa9c998c12c12cc4f921819fff34a5ced1c9b..13882a2c060c9da57e083bbd1465a73b57020fa1 100644
--- a/LArCalorimeter/LArConfiguration/python/LArMonitoringConfig.py
+++ b/LArCalorimeter/LArConfiguration/python/LArMonitoringConfig.py
@@ -15,7 +15,8 @@ def LArMonitoringConfig(inputFlags):
     
     # algos which could run anytime (therefore should not in tier0Raw):
     if inputFlags.DQ.Environment != 'tier0Raw':
-        acc.merge(LArAffectedRegionsConfig(inputFlags))
+        if not inputFlags.Input.isMC:
+            acc.merge(LArAffectedRegionsConfig(inputFlags))
 
     # algos which can run in ESD but not AOD:
     if inputFlags.DQ.Environment != 'AOD':