diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 6e45417c0..c16d56568 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -490,7 +490,9 @@ bool Blockchain::deinit()
   }
 
   delete m_hardfork;
+  m_hardfork = NULL;
   delete m_db;
+  m_db = NULL;
   return true;
 }
 //------------------------------------------------------------------