diff --git a/simulation/libsimulator b/simulation/libsimulator
index f0e42435d..ea3bffe3c 160000
--- a/simulation/libsimulator
+++ b/simulation/libsimulator
@@ -1 +1 @@
-Subproject commit f0e42435dce3ff227cc81b17ccab143b21d8f771
+Subproject commit ea3bffe3c53bca5e0976914ea951193ba43fbed6
diff --git a/src/kademlia/dht_storage.cpp b/src/kademlia/dht_storage.cpp
index 1d223f12a..989462347 100644
--- a/src/kademlia/dht_storage.cpp
+++ b/src/kademlia/dht_storage.cpp
@@ -362,6 +362,7 @@ namespace
 			, char const* buf, int size
 			, address const& addr) override
 		{
+			TORRENT_ASSERT(!m_node_ids.empty());
 			dht_immutable_table_t::iterator i = m_immutable_table.find(target);
 			if (i == m_immutable_table.end())
 			{
@@ -427,6 +428,7 @@ namespace
 			, char const* salt, int salt_size
 			, address const& addr) override
 		{
+			TORRENT_ASSERT(!m_node_ids.empty());
 			dht_mutable_table_t::iterator i = m_mutable_table.find(target);
 			if (i == m_mutable_table.end())
 			{