diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 7ef8f8c45..daa1fe517 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -3896,6 +3896,10 @@ leave:
 //------------------------------------------------------------------
 bool Blockchain::prune_blockchain(uint32_t pruning_seed)
 {
+  m_tx_pool.lock();
+  epee::misc_utils::auto_scope_leave_caller unlocker = epee::misc_utils::create_scope_leave_handler([&](){m_tx_pool.unlock();});
+  CRITICAL_REGION_LOCAL(m_blockchain_lock);
+
   return m_db->prune_blockchain(pruning_seed);
 }
 //------------------------------------------------------------------