diff --git a/src/cryptonote_basic/miner.cpp b/src/cryptonote_basic/miner.cpp
index e6c6bddb6..173679e21 100644
--- a/src/cryptonote_basic/miner.cpp
+++ b/src/cryptonote_basic/miner.cpp
@@ -528,6 +528,7 @@ namespace cryptonote
     uint32_t local_template_ver = 0;
     block b;
     slow_hash_allocate_state();
+    ++m_threads_active;
     while(!m_stop)
     {
       if(m_pausers_count)//anti split workaround