diff --git a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
index 2901f9ba..632c2cc6 100644
--- a/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
+++ b/src/cryptonote_core/BlockchainDB_impl/db_lmdb.cpp
@@ -67,6 +67,7 @@ struct lmdb_cur
     }
   }
 
+private:
   MDB_cursor* m_cur;
   bool done;
 };