diff --git a/src/bench/duplicate_inputs.cpp b/src/bench/duplicate_inputs.cpp
index 9dbca45..fd10290 100644
--- a/src/bench/duplicate_inputs.cpp
+++ b/src/bench/duplicate_inputs.cpp
@@ -27,7 +27,11 @@ static void DuplicateInputs(benchmark::Bench& bench)
     LOCK(cs_main);
     CBlockIndex* pindexPrev = testing_setup->m_node.chainman->ActiveChain().Tip();
     assert(pindexPrev != nullptr);
-    block.nBits = GetNextWorkRequired(pindexPrev, &block, chainparams.GetConsensus());
+    block.nBits = GetNextWorkRequired(
+        pindexPrev,
+        &block,
+        chainparams.GetConsensus(),
+        ALGO_SHA256D);
     block.nNonce = 0;
     auto nHeight = pindexPrev->nHeight + 1;