1 files changed, 3 insertions, 1 deletions
diff --git a/src/bench/duplicate_inputs.cpp b/src/bench/duplicate_inputs.cpp
index e0854e2c62..1f6840d813 100644
--- a/src/bench/duplicate_inputs.cpp
+++ b/src/bench/duplicate_inputs.cpp
@@ -37,10 +37,12 @@ static void DuplicateInputs(benchmark::State& state)
     CScheduler scheduler;
     const CChainParams& chainparams = Params();
     {
+        LOCK(cs_main);
         ::pblocktree.reset(new CBlockTreeDB(1 << 20, true));
         ::pcoinsdbview.reset(new CCoinsViewDB(1 << 23, true));
         ::pcoinsTip.reset(new CCoinsViewCache(pcoinsdbview.get()));
-
+    }
+    {
         thread_group.create_thread(std::bind(&CScheduler::serviceQueue, &scheduler));
         GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
         LoadGenesisBlock(chainparams);