diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index cbfda7b61b..54c3c10316 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -972,7 +972,7 @@ std::optional<CTxMemPool::txiter> CTxMemPool::GetIter(const uint256& txid) const
 {
     auto it = mapTx.find(txid);
     if (it != mapTx.end()) return it;
-    return {};
+    return std::nullopt;
 }
 
 CTxMemPool::setEntries CTxMemPool::GetIterSet(const std::set<uint256>& hashes) const
diff --git a/src/validation.cpp b/src/validation.cpp
index f23423d455..ef567434a4 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5545,7 +5545,7 @@ std::optional<uint256> ChainstateManager::SnapshotBlockhash() const {
         // If a snapshot chainstate exists, it will always be our active.
         return m_active_chainstate->m_from_snapshot_blockhash;
     }
-    return {};
+    return std::nullopt;
 }
 
 std::vector<CChainState*> ChainstateManager::GetAll()