diff --git a/nano/node/lmdb.cpp b/nano/node/lmdb.cpp
index 6ade105a..cd7b749e 100644
--- a/nano/node/lmdb.cpp
+++ b/nano/node/lmdb.cpp
@@ -1212,7 +1212,8 @@ void nano::mdb_store::upgrade_v12_to_v13 (size_t const batch_size)
 	size_t cost (0);
 	nano::account account (0);
 	auto transaction (tx_begin_write ());
-	while (!stopped && account != nano::not_an_account)
+	auto const & not_an_account (nano::not_an_account ());
+	while (!stopped && account != not_an_account)
 	{
 		nano::account first (0);
 		nano::account_info second;
@@ -1261,10 +1262,10 @@ void nano::mdb_store::upgrade_v12_to_v13 (size_t const batch_size)
 		}
 		else
 		{
-			account = nano::not_an_account;
+			account = not_an_account;
 		}
 	}
-	if (account == nano::not_an_account)
+	if (account == not_an_account)
 	{
 		BOOST_LOG (logging.log) << boost::str (boost::format ("Completed sideband upgrade"));
 		version_put (transaction, 13);
diff --git a/nano/node/node.cpp b/nano/node/node.cpp
index b7547052..8952904e 100644
--- a/nano/node/node.cpp
+++ b/nano/node/node.cpp
@@ -3021,7 +3021,7 @@ confirmed (false),
 stopped (false),
 announcements (0)
 {
-	last_votes.insert (std::make_pair (nano::not_an_account, nano::vote_info{ std::chrono::steady_clock::now (), 0, block_a->hash () }));
+	last_votes.insert (std::make_pair (nano::not_an_account (), nano::vote_info{ std::chrono::steady_clock::now (), 0, block_a->hash () }));
 	blocks.insert (std::make_pair (block_a->hash (), block_a));
 }
 
diff --git a/nano/secure/common.cpp b/nano/secure/common.cpp
index 5e894b67..f8d98ad4 100644
--- a/nano/secure/common.cpp
+++ b/nano/secure/common.cpp
@@ -64,10 +64,6 @@ public:
 	genesis_amount (std::numeric_limits<nano::uint128_t>::max ()),
 	burn_account (0)
 	{
-		CryptoPP::AutoSeededRandomPool random_pool;
-		// Randomly generating these mean no two nodes will ever have the same sentinel values which protects against some insecure algorithms
-		random_pool.GenerateBlock (not_a_block.bytes.data (), not_a_block.bytes.size ());
-		random_pool.GenerateBlock (not_an_account.bytes.data (), not_an_account.bytes.size ());
 	}
 	nano::keypair zero_key;
 	nano::keypair test_genesis_key;
@@ -80,9 +76,24 @@ public:
 	nano::account genesis_account;
 	std::string genesis_block;
 	nano::uint128_t genesis_amount;
-	nano::block_hash not_a_block;
-	nano::account not_an_account;
 	nano::account burn_account;
+
+	nano::account const & not_an_account ()
+	{
+		static bool is_initialized = false;
+		static std::mutex mutex;
+		std::lock_guard<std::mutex> lk (mutex);
+		if (!is_initialized)
+		{
+			// Randomly generating these mean no two nodes will ever have the same sentinel values which protects against some insecure algorithms
+			nano::random_pool.GenerateBlock (not_an_account_m.bytes.data (), not_an_account_m.bytes.size ());
+			is_initialized = true;
+		}
+		return not_an_account_m;
+	}
+
+private:
+	nano::account not_an_account_m;
 };
 ledger_constants globals;
 }
@@ -105,10 +116,11 @@ std::string const & nano::nano_live_genesis (globals.nano_live_genesis);
 nano::account const & nano::genesis_account (globals.genesis_account);
 std::string const & nano::genesis_block (globals.genesis_block);
 nano::uint128_t const & nano::genesis_amount (globals.genesis_amount);
-nano::block_hash const & nano::not_a_block (globals.not_a_block);
-nano::block_hash const & nano::not_an_account (globals.not_an_account);
 nano::account const & nano::burn_account (globals.burn_account);
-
+nano::account const & nano::not_an_account ()
+{
+	return globals.not_an_account ();
+}
 // Create a new random keypair
 nano::keypair::keypair ()
 {
diff --git a/nano/secure/common.hpp b/nano/secure/common.hpp
index 7b2d07fe..4af0c0d3 100644
--- a/nano/secure/common.hpp
+++ b/nano/secure/common.hpp
@@ -320,10 +320,8 @@ extern std::string const & genesis_block;
 extern nano::account const & genesis_account;
 extern nano::account const & burn_account;
 extern nano::uint128_t const & genesis_amount;
-// A block hash that compares inequal to any real block hash
-extern nano::block_hash const & not_a_block;
 // An account number that compares inequal to any real account number
-extern nano::block_hash const & not_an_account;
+extern nano::account const & not_an_account ();
 class genesis
 {
 public: