diff --git a/rai/node/node.cpp b/rai/node/node.cpp
index d1188d2a..bf31ed12 100644
--- a/rai/node/node.cpp
+++ b/rai/node/node.cpp
@@ -3674,22 +3674,28 @@ void rai::active_transactions::announce_votes ()
 				if there are less than 100 active elections */
 				if (i->announcements % announcement_long == 1 && roots.size () < 100)
 				{
+					std::unique_ptr<rai::block> previous (nullptr);
 					auto previous_hash (election_l->status.winner->previous ());
 					if (!previous_hash.is_zero ())
 					{
-						auto previous (node.store.block_get (transaction, previous_hash));
+						previous = node.store.block_get (transaction, previous_hash);
 						if (previous != nullptr)
 						{
 							add (std::make_pair (std::move (previous), nullptr));
 						}
 					}
-					auto source_hash (node.ledger.block_source (transaction, *election_l->status.winner));
-					if (!source_hash.is_zero ())
+					/* If previous block not existing/not commited yet, block_source can cause segfault for state blocks
+					So source check can be done only if previous != nullptr or previous is 0 (open account) */
+					if (previous_hash.is_zero () || previous != nullptr)
 					{
-						auto source (node.store.block_get (transaction, source_hash));
-						if (source != nullptr)
+						auto source_hash (node.ledger.block_source (transaction, *election_l->status.winner));
+						if (!source_hash.is_zero ())
 						{
-							add (std::make_pair (std::move (source), nullptr));
+							auto source (node.store.block_get (transaction, source_hash));
+							if (source != nullptr)
+							{
+								add (std::make_pair (std::move (source), nullptr));
+							}
 						}
 					}
 				}
diff --git a/rai/secure/ledger.cpp b/rai/secure/ledger.cpp
index fedbdfff..7348658f 100644
--- a/rai/secure/ledger.cpp
+++ b/rai/secure/ledger.cpp
@@ -729,6 +729,13 @@ rai::block_hash rai::ledger::block_destination (rai::transaction const & transac
 
 rai::block_hash rai::ledger::block_source (rai::transaction const & transaction_a, rai::block const & block_a)
 {
+	/*
+	 * block_source() requires that the previous block of the block
+	 * passed in exist in the database.  This is because it will try
+	 * to check account balances to determine if it is a send block.
+	 */
+	assert (block_a.previous ().is_zero () || store.block_exists (transaction_a, block_a.previous ()));
+
 	// If block_a.source () is nonzero, then we have our source.
 	// However, universal blocks will always return zero.
 	rai::block_hash result (block_a.source ());