diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index 409cb488e..635e867e5 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -544,7 +544,7 @@ namespace aux {
 #endif
 		, m_total_failed_bytes(0)
 		, m_total_redundant_bytes(0)
-#if defined TORRENT_DEBUG && defined BOOST_HAS_PTHREADS
+#if (defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS) && defined BOOST_HAS_PTHREADS
 		, m_network_thread(0)
 #endif
 	{
@@ -815,6 +815,11 @@ namespace aux {
 		extern void get_vm_stats(vm_statistics_data_t* vm_stat);
 		get_vm_stats(&m_last_vm_stat);
 
+		m_last_failed = 0;
+		m_last_redundant = 0;
+		m_last_uploaded = 0;
+		m_last_downloaded = 0;
+
 		reset_stat_counters();
 		rotate_stats_log();
 #endif
@@ -4016,7 +4021,7 @@ namespace aux {
 
 	void session_impl::main_thread()
 	{
-#if defined TORRENT_DEBUG && defined BOOST_HAS_PTHREADS
+#if (defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS) && defined BOOST_HAS_PTHREADS
 		m_network_thread = pthread_self();
 #endif
 		TORRENT_ASSERT(is_network_thread());
@@ -4064,7 +4069,7 @@ namespace aux {
 		TORRENT_ASSERT(m_torrents.empty());
 		TORRENT_ASSERT(m_connections.empty());
 
-#if defined TORRENT_DEBUG && defined BOOST_HAS_PTHREADS
+#if (defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS) && defined BOOST_HAS_PTHREADS
 		m_network_thread = 0;
 #endif
 	}