diff --git a/SimGeneral/MixingModule/python/digitizersCosmics_cfi.py b/SimGeneral/MixingModule/python/digitizersCosmics_cfi.py
index b81807992e094..9c1bce518f9bc 100644
--- a/SimGeneral/MixingModule/python/digitizersCosmics_cfi.py
+++ b/SimGeneral/MixingModule/python/digitizersCosmics_cfi.py
@@ -55,7 +55,9 @@
   )
 )
 
-
+from Configuration.Eras.Modifier_run3_common_cff import run3_common
+run3_common.toModify( theDigitizers, castor = None )
+run3_common.toModify( theDigitizersValid, castor = None )