diff --git a/Configuration/PyReleaseValidation/python/MatrixInjector.py b/Configuration/PyReleaseValidation/python/MatrixInjector.py
index 04abe9c79aeb6..d08b7dd522711 100644
--- a/Configuration/PyReleaseValidation/python/MatrixInjector.py
+++ b/Configuration/PyReleaseValidation/python/MatrixInjector.py
@@ -218,6 +218,8 @@ def prepare(self,mReader, directories, mode='init'):
                                     chainDict['nowmTasklist'][-1]['EventsPerJob'] = ns[1]
                                 if 'FASTSIM' in s[2][index] or '--fast' in s[2][index]:
                                     thisLabel+='_FastSim'
+                                if 'lhe' in s[2][index] or '--fast' in s[2][index]:
+                                    chainDict['nowmTasklist'][-1]['LheInputFiles'] =True
 
                             elif nextHasDSInput:
                                 chainDict['nowmTasklist'].append(copy.deepcopy(self.defaultInput))