diff --git a/GeneratorInterface/GenFilters/plugins/MCSmartSingleParticleFilter.cc b/GeneratorInterface/GenFilters/plugins/MCSmartSingleParticleFilter.cc
index c8ccb35a45126..200531a26e15c 100644
--- a/GeneratorInterface/GenFilters/plugins/MCSmartSingleParticleFilter.cc
+++ b/GeneratorInterface/GenFilters/plugins/MCSmartSingleParticleFilter.cc
@@ -56,7 +56,7 @@ using namespace std;
 
 MCSmartSingleParticleFilter::MCSmartSingleParticleFilter(const edm::ParameterSet& iConfig)
     : token_(consumes<edm::HepMCProduct>(
-          edm::InputTag(iConfig.getUntrackedParameter("moduleLabel", std::string("generator")), "unsmeared"))),
+          iConfig.getUntrackedParameter<edm::InputTag>("moduleLabel", edm::InputTag("generator", "unsmeared")))),
       betaBoost(iConfig.getUntrackedParameter("BetaBoost", 0.)) {
   vector<int> defpid;
   defpid.push_back(0);