--- a/LimitFrequentist.cxx
+++ b/LimitFrequentist.cxx
@@ -121,9 +121,10 @@ LimitBase::LimitResult LimitFrequentist::GetLimit( RooWorkspace *ws, RooStats::M
     hypoCalc -> SetToys(m_nToys,m_nToys/10.);// null toys, alt toys
     RooStats::ToyMCSampler *toymcs = (RooStats::ToyMCSampler*)hypoCalc->GetTestStatSampler();
     toymcs->SetTestStatistic(testStat);
+    RooStats::ProofConfig * pc = nullptr; 
     if(m_nWorkers>0) {
-        RooStats::ProofConfig pc(*ws, m_nWorkers, "", false);
-        toymcs->SetProofConfig(&pc); // enable proof
+        pc = new RooStats::ProofConfig(*ws, m_nWorkers, "", false);
+        toymcs->SetProofConfig(pc); // enable proof
     }
 
     //
@@ -151,5 +152,7 @@ LimitBase::LimitResult LimitFrequentist::GetLimit( RooWorkspace *ws, RooStats::M
     res.ExpP1s = m_pHTIR -> GetExpectedUpperLimit(1);
     res.ExpP2s = m_pHTIR -> GetExpectedUpperLimit(2);
 
+    if (pc) delete pc; 
+
     return res;
 
 }