diff --git a/src/cryptonote_core/miner.cpp b/src/cryptonote_core/miner.cpp
index 2055bb15d..d021b05bd 100644
--- a/src/cryptonote_core/miner.cpp
+++ b/src/cryptonote_core/miner.cpp
@@ -23,7 +23,8 @@ using namespace epee;
 #include "miner.h"
 
 
-
+extern "C" void slow_hash_allocate_state();
+extern "C" void slow_hash_free_state();
 namespace cryptonote
 {
 
@@ -320,6 +321,7 @@ namespace cryptonote
     difficulty_type local_diff = 0;
     uint32_t local_template_ver = 0;
     block b;
+	  slow_hash_allocate_state();
     while(!m_stop)
     {
       if(m_pausers_count)//anti split workaround
@@ -368,6 +370,7 @@ namespace cryptonote
       nonce+=m_threads_total;
       ++m_hashes;
     }
+	  slow_hash_free_state();
     LOG_PRINT_L0("Miner thread stopped ["<< th_local_index << "]");
     return true;
   }