diff --git a/Validation/Configuration/python/autoValidation.py b/Validation/Configuration/python/autoValidation.py
index 1054977fec562..583e02a342fc9 100644
--- a/Validation/Configuration/python/autoValidation.py
+++ b/Validation/Configuration/python/autoValidation.py
@@ -15,4 +15,6 @@
 _phase2_allowed = ['baseValidation','trackingValidation','muonOnlyValidation','JetMETOnlyValidation','bTagOnlyValidation','hcalOnlyValidation', 'HGCalValidation']
 autoValidation['phase2Validation'] = ['','','']
 for i in range(0,3):
-    autoValidation['phase2Validation'][i] = '+'.join([autoValidation[m][i] for m in _phase2_allowed])
+    autoValidation['phase2Validation'][i] = '+'.join(filter(None,[autoValidation[m][i] for m in _phase2_allowed]))
+
+print autoValidation['phase2Validation']