diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 1cd323a46..7713d97bb 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -571,6 +571,7 @@ namespace cryptonote
     responce.difficulty = m_core.get_blockchain_storage().block_difficulty(height);
     responce.reward = get_block_reward(blk);
     responce.tx_count = blk.tx_hashes.size();
+    responce.cumulative_difficulty = m_core.get_blockchain_storage().block_cumulative_difficulty(height);
     return true;
   }
   //------------------------------------------------------------------------------------------------------------------------------
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index f87d84bc8..a71d032c2 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -399,6 +399,7 @@ namespace cryptonote
       difficulty_type difficulty;
       uint64_t reward;
       size_t tx_count;
+      uint64_t cumulative_difficulty;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(major_version)
@@ -413,6 +414,7 @@ namespace cryptonote
         KV_SERIALIZE(difficulty)
         KV_SERIALIZE(reward)
         KV_SERIALIZE(tx_count)
+        KV_SERIALIZE(cumulative_difficulty)
       END_KV_SERIALIZE_MAP()
   };